| 1. |
- Andersson, Maria L.E., et al.
(författare)
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Autoantibodies to Disease-Related Proteins in Joints as Novel Biomarkers for the Diagnosis of Rheumatoid Arthritis
- 2023
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Ingår i: Arthritis & Rheumatology. - : Wiley. - 2326-5191 .- 2326-5205. ; 75:7, s. 1110-1119
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Tidskriftsartikel (refereegranskat)abstract
- Objective. This study was undertaken to develop and characterize a multiplex immunoassay for detection of autoantibodies against peptides derived from proteins known to play a role in development of arthritis and that are also expressed in joints.Methods. We selected peptides from the human counterpart of proteins expressed in the joints, based on mouse models that showed these to be targeted by pathogenic or regulatory antibodies in vivo. Using bead-based flow immunoassays measuring IgG antibodies, we selected triple helical or cyclic peptides, containing the epitopes, to avoid collinear reactivity. We characterized the analytical performance of the immunoassay and then validated it in 3 independent rheumatoid arthritis (RA) cohorts (n = 2,110), Swedish age- and sex-matched healthy controls, and patients with osteoarthritis (OA), patients with psoriatic arthritis (PsA), and patients with systemic lupus erythematosus (SLE).Results. Screening assays showed 5 peptide antigens that discriminated RA patients from healthy controls with 99% specificity (95% confidence interval [CI] 98-100%). In our validation studies, we reproduced the discriminatory capacity of the autoantibodies in 2 other RA cohorts, showing that the autoantibodies had high discriminatory capacity for RA versus OA, PsA, and SLE. The novel biomarkers identified 22.5% (95% CI 19-26%) of early RA patients seronegative for anti-cyclic citrullinated peptide and rheumatoid factor. The usefulness of the biomarkers in identifying seronegative RA patients was confirmed in validation studies using 2 independent cohorts of RA patients and cohorts of patients with OA, PsA, and SLE.Conclusion. A multiplex immunoassay with peptides from disease-related proteins in joints was found to be useful for detection of specific autoantibodies in RA serum. Of note, this immunoassay had high discriminatory capacity for early seronegative RA.
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| 2. |
- Qvarfordt, Maria, 1982-, et al.
(författare)
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Patients’ experiences of reasons to being physically active in early rheumatoid arthritis – a mixed methods study
- 2019
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Ingår i: Annals of the Rheumatic Diseases. - London, UK : BMJ Publishing Group Ltd. - 0003-4967 .- 1468-2060. ; 78:Suppl 2, s. 1454-1455
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Tidskriftsartikel (refereegranskat)abstract
- Background: The importance of physical activity in rheumatoid arthritis (RA) is well known and patients are informed about the importance of being physically active. Despite this knowledge there is a lack of compliance to this advice. Studies comparing physical activity in different groups of patients with RA and reasons influencing physical activity are needed. Objectives: The objectives were to compare physical activity (PA) in workers, retired and patients with sick-leave with early RA and further to explore reasons to being physically active in these patients. Methods: A total of 66 patients with early RA were included in the study. A sequential explanatory mixed methods design was used. The groups were compared with clinical data as: disease activity (DAS28); pain (VAS 0-100, best to worst); health-related quality of life (EQ5D, -0.594-1 worse to best) and a physical function (HAQ, 0-3 best to worst). ESR and CRP. Patients were dichotomized as being active on recommended levels of PA (MVPArec; physically active on a moderate level ≥150min/week (MPA) or on an intense level ≥75min/week (VPA)) or not (sedentary). The patients were grouped on self-reported working ability; workers, patients with sick-leave and retired patients. Qualitative data was collected by a questionnaire with open-ended questions about reasons influencing PA. The qualitative data was analysed with a manifest qualitative content analysis to gain a greater understanding of patients’ experiences of PA in early RA. Results: There were no significant differences between the groups in disease activity, physical function, swollen joints, health-related quality of life or inflammatory parameters (ESR, CRP). Patients on sick-leave had more tender joints median (min-max) 9 (2-18) vs. 4 (0-20) and 3 (0-10), p=0.013. Workers reported higher intensity of pain, though not significant. Retired patients fulfilled MVPA criteria to a higher rate (86%) than workers (42%) or patients with sick-leave (40%), p=0.010. The qualitative content analysis resulted in three categories. Reasons to being physically active in patients with early RA were; limitations (pain, physical function, stiffness, limited strength and fatigue), awareness as motivation (fear of movement and health benefits) and external environment (weather, transports to activity, economy and time, especially for workers). Conclusion: Knowledge of reasons to being physically active in patients with RA is important to facilitate and support the patients. Joint pain seems to be an issue for patients with sick-leave. This could be associated to fear of movement and in this aspect these patients need to be supported. Time could be a limiting issue for working patients, which need to be highlighted and solved for these patients. © Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ.
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| 3. |
- Söderlin, Maria K., et al.
(författare)
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Second-hand exposure to tobacco smoke and its effect on disease activity in Swedish rheumatoid arthritis patients. Data from BARFOT, a multicenter study of RA
- 2013
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Ingår i: Clinical and Experimental Rheumatology. - Ospedaletto, PI : Pacini Editore SpA. - 0392-856X .- 1593-098X. ; 31:1, s. 122-124
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: We studied the prevalence and effect on disease activity of ever having had second-hand exposure to tobacco smoke in Swedish rheumatoid arthritis (RA) patients who had never smoked.METHODS: Between 1992 and 2005, 2,800 patients were included in the BARFOT early-RA study in Sweden. Disease Activity Score 28 joints (DAS28), C-reactive protein (CRP), Health Assessment Questionnaire (HAQ), rheumatoid factor (RF), general health and pain visual analogue scales (VAS), and drug treatment were registered at inclusion and at follow-up at 3, 6, and 12 months and 2 and 5 years. EULAR response criteria were applied at the same follow-up points. In 2010, a self-completion postal questionnaire was sent to 2,102 patients in the BARFOT study enquiring about lifestyle habits such as whether they had ever been exposed to tobacco smoke as a result of someone else smoking.RESULTS: A total of 963/1,421 patients (68%) had had second-hand exposure to tobacco smoke. At 3, 6, and 12 months, at 2 years, and at 5 years of follow-up, there were no differences in EULAR response between patients who had never smoked and who had been exposed or had not been exposed second-hand to tobacco smoke (p=0.91, p=0.88, p=0.84, p=0.61 and p=0.85, respectively).CONCLUSIONS: We did not find any association between second-hand exposure to tobacco smoke and disease activity in RA. © Clinical and Experimental Rheumatology 2013.
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| 4. |
- Söderlin, Maria, et al.
(författare)
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The Effect of Socioeconomic Class and Immigrant Status on Disease Activity in Rheumatoid Arthritis. Data from BARFOT, A Multicenter Study of Early RA
- 2013
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Ingår i: Annals of the Rheumatic Diseases. - London : BMJ Books. - 0003-4967 .- 1468-2060. ; 72:Suppl. 3, s. A395-A395
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Tidskriftsartikel (refereegranskat)abstract
- Background: There are no studies reporting the effect of immigrant status and socioeconomic status on outcome in rheumatoid arthritis (RA) in Sweden.Objectives: We wanted to study the effect of immigration and socioeconomic class on outcome in RA in Sweden.Methods: Between 1992 and 2005, 2,800 adult patients were included in the BARFOT early RA study in Sweden. Disease Activity Score 28 joints (DAS28), Health Assessment Questionnaire (HAQ), drug treatment and European League Against Rheumatism (EULAR) response criteria were applied up to 8 years. The patients completed in 2010 a questionnaire enquiring about demographics and lifestyle factorsResults: A total of 139/1430 (9.5%) of the patients were immigrants. Immigrants had higher baseline mean HAQ (immigrants 1.2 vs. non-immigrants 0.97, p=0.001), DAS28 (5.6 vs. 5.2, p=0.0001), visual analog scale (VAS) pain (56 mm vs. 45 mm, p=0.0001), VAS global health (53 mm vs. 44 mm, p=0.0001) and tender joint count (TJC) (10 vs. 8, p=0.0001), these differences persisting up to 2 years of follow-up and for HAQ up to 8 years of follow-up. Immigrant status did not have effect on swollen joint count (SJC), ESR, CRP or EULAR response. Socioeconomic class did not have impact on treatment or outcome.Conclusions: Immigrants scored worse in pain, function and TJC up to 2 years of follow-up, but did not differ in objective measures of inflammation or EULAR outcome as compared to non-immigrants. This could be due to different perceptions of health and pain and/or the stress of immigration. Socioeconomic class did not have impact on treatment or outcome and this could be due to the relatively egalitarian society in Sweden.Disclosure of Interest: M. Söderlin Consultant for: Pfizer, Speakers bureau: Abbott, MSD, BMS, Pfizer, S. Bergman: None Declared, M. Andersson: None Declared
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| 5. |
- Aili, Katarina, et al.
(författare)
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Sleep problems and fatigue as a predictor for the onset of chronic widespread painover a 5- and 18-year perspective : a 20-year prospective study
- 2018
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Ingår i: Annals of the Rheumatic Diseases. - London : BMJ Publishing Group Ltd. - 0003-4967 .- 1468-2060. ; 77, s. 87-87
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Tidskriftsartikel (refereegranskat)abstract
- Background: If localised pain represent one end of a pain spectra, with overall better general health, chronic widespread pain (CWP) and fibromyalgia represent the other end of the spectra with worse general health and more comorbidities with other somatic diseases and mental illness. Sleep problems and fatigue are common among individuals reporting CWP and previous research indicate that sleep problems may be an important predictor for pain prognosis.Objectives: The aim of this population-based study was to investigate if sleep problems and fatigue predict the onset of CWP 5 and 18 years later.Methods: In order to get more stable baseline classifications of CWP, a wash-out period was used, including only individuals who had not reported CWP (according to ACR 1990 criteria for fibromyalgia) at baseline (−98) and three years prior baseline (−95). In all, data from 1249 individuals entered the analyses for the 5 year follow-up (−03) and 791 entered for the 18 year follow-up (−16). Four parameters related to sleep (difficulties initiating sleep, maintaining sleep, early morning awakening and non-restorative sleep), and one parameter related to fatigue (SF-36 vitality scale) were investigated as predictors for CWP. Binary logistic regression analysis were used for analyses.Results: All investigated parameters predicted the onset of CWP five years later (problems with initiating sleep (OR 1.91; 1.16–3.14), maintaining sleep (OR 1.85; 1.14–3.01), early awakening (OR 2.0; 1.37–3.75), non-restorative sleep (OR 2.27; 1.37–3.75) and fatigue (OR 3.70; 1.76–7.84)) in a model adjusted for age, gender, socio-economy and mental health. All parameters except problems with early awakening predicted the onset of CWP also 18 years later. In all, 785 individuals did not report any of the sleeping problems at baseline (fatigue not included), 268 reported one of the problems, 167 two, 128 three and 117 subjects reported to have all four sleep problems. Reporting all four sleep problems was significantly associated with CWP at follow-up at both time points when adjusting for age, gender, socio economy and mental health (OR 4.00; 2.03–7.91 and OR 3.95; 1.90–8.20); adjusting for age, gender, socio economy and number of pain regions (OR 2.94; 1.48–5.82 and OR 2.65; 1.24–5.64) and in a model adjusting for age, gender, socio economy and pain severity (OR 2.97;1.53–5.76; and OR 3.02;1.47–6.21) for the 5 year and 18 year follow-up respectively, compared to not reporting any of the sleep problems at baseline.Conclusions: Both sleeping problems and fatigue predicts the onset of CWP 5- and 18 years later. The results highlight the importance of the assessment of sleep quality in the clinic.
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| 6. |
- Aili, Katarina, 1980-, et al.
(författare)
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Sleep problems and fatigue as predictors for the onset of chronic widespread pain over a 5-and 18-year perspective
- 2018
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Ingår i: Bmc Musculoskeletal Disorders. - London : Springer Science and Business Media LLC. - 1471-2474. ; 19
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundPrevious research suggests that sleep problems may be an important predictor for chronic widespread pain (CWP). With this study we investigated both sleep problems and fatigue as predictors for the onset of CWP over a 5-year and an 18-year perspective in a population free from CWP at baseline.MethodsTo get a more stable classification of CWP, we used a wash-out period, including only individuals who had not reported CWP at baseline (1998) and three years prior baseline (1995). In all, data from 1249 individuals entered the analyses for the 5-year follow-up and 791 entered for the 18-year follow-up. Difficulties initiating sleep, maintaining sleep, early morning awakening, non-restorative sleep and fatigue were investigated as predictors separately and simultaneously in binary logistic regression analyses.ResultsThe results showed that problems with initiating sleep, maintaining sleep, early awakening and non-restorative sleep predicted the onset of CWP over a 5-year (OR 1.85 to OR 2.27) and 18-year (OR 1.54 to OR 2.25) perspective irrespective of mental health (assessed by SF-36) at baseline. Also fatigue predicted the onset of CWP over the two-time perspectives (OR 3.70 and OR 2.36 respectively) when adjusting for mental health. Overall the effect of the sleep problems and fatigue on new onset CWP (over a 5-year perspective) was somewhat attenuated when adjusting for pain at baseline but remained significant for problems with early awakening, non-restorative sleep and fatigue. Problems with maintaining sleep predicted CWP 18years later irrespective of mental health and number of pain regions (OR 1.72). Reporting simultaneous problems with all four aspects of sleep was associated with the onset of CWP over a five-year and 18-yearperspective, irrespective of age, gender, socio economy, mental health and pain at baseline. Sleep problems and fatigue predicted the onset of CWP five years later irrespective of each other.ConclusionSleep problems and fatigue were both important predictors for the onset of CWP over a five-year perspective. Sleep problems was a stronger predictor in a longer time-perspective. The results highlight the importance of the assessment of sleep quality and fatigue in the clinic.
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| 7. |
- Ajeganova, Sofia, et al.
(författare)
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Higher levels of anti-phosphorylcholine autoantibodies in early rheumatoid arthritis indicate lower risk of incident cardiovascular events
- 2021
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Ingår i: Arthritis Research and Therapy. - : Springer Science and Business Media LLC. - 1478-6354 .- 1478-6362. ; 23:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: The increased risk of cardiovascular events (CVE) in rheumatoid arthritis (RA) is not fully explained by traditional risk factors. Immuno-inflammatory mechanisms and autoantibodies could be involved in the pathogenesis of atherosclerotic disease. It has been suggested that anti-phosphorylcholine antibodies (anti-PC) of the IgM subclass may have atheroprotective effects. Here, we aimed to investigate the association between levels of IgM anti-PC antibodies with CVE in patients with early RA. Methods: The study population was derived from the BARFOT early RA cohort, recruited in 1994–1999. The outcome of incident CVE (AMI, angina pectoris, coronary intervention, ischemic stroke, TIA) was tracked through the Swedish Hospital Discharge and the National Cause of Death Registries. Sera collected at inclusion and the 2-year visit were analyzed with ELISA to determine levels of anti-PC IgM. The Kaplan-Meier estimates and Cox proportional hazards regression models were used to compare CV outcome in the groups categorized by baseline median level of IgM anti-PC. Results: In all, 653 patients with early RA, 68% women, mean (SD) age 54.8 (14.7) years, DAS28 5.2 (1.3), 68% seropositive, and without prevalent CVD, were included. During the follow-up of mean 11.7 years, 141 incident CVE were recorded. Baseline IgM anti-PC above median was associated with a reduction in risk of incident CVE in patients aged below 55 years at inclusion, HR 0.360 (95% CI, 0.142–0.916); in males, HR 0.558 (0.325–0.958); in patients with BMI above 30 kg/m2, HR 0.235 (0.065–0.842); and in those who did not achieve DAS28 remission at 1 year, HR 0.592 (0.379–0.924). The pattern of associations was confirmed in the models with AUC IgM anti-PC over 2 years. Conclusion: Protective effects of higher levels of innate IgM anti-PC autoantibodies on CVE were detected in younger patients with RA and those at high risk of CVE: males, presence of obesity, and non-remission at 1 year.
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| 8. |
- Andersson, Maria L.E. 1968-, et al.
(författare)
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Associations Between Chronic Widespread Pain, Pressure Pain Thresholds and Leptin in Individuals with Knee Pain
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Previous studies have reported associations between obesity, chronic pain and increased pain sensitivity. The adipokine leptin has been suggested to be involved in the osteoarthritis process as well as in pain sensitisation.ObjectivesThe aim was to study associations between chronic widespread pain, pain sensitivity and leptin in individuals with knee pain.MethodsIn all, 306 individuals with knee pain were included in the Halland osteoarthritis cohort, ClinicalTrials.gov NCT04928170. Of those, 265 were included in this cross-sectional baseline study. The mean age (sd) was 51.6 (8.8) years, and 71% was women. The participants marked their painful areas on a pain figure with 18 predefined areas. They were categorised in three different pain groups according to the modified WP2019 definition (1), with knees excluded (due to highest goodness of fit): Chronic widespread pain (CWP), chronic regional pain (ChRP) if CWP was not met, and no chronic pain (NCP). The group with CWP were compared with those reporting no CWP (ChRP and NCP). The pressure pain thresholds (PPT) were measured using a computerised pressure algometry (AlgoMed, Medoc) on eight predefined tender points (trapezius (bilateral), right second rib, right lateral epicondyle, knees, gluteal (bilateral)) (2). Increased pain sensitivity was defined as having PPT in the lowest third in all tender points. Obesity was measured via waistline measurement and a bioimpedance (InBody 770) measuring BMI and visceral fat area (VFA). Serum-Leptin were analysed with an ELISA method (Alpco). Knee Injury and Osteoarthritis Outcome Score (KOOS) was used to describe the groups.ResultsIn this baseline study, 16% reported CWP, and 15% had low pain pressure thresholds at baseline in the study. Those fulfilling CWP were more often women, had higher BMI, VFA, and increased leptin levels and worse KOOS in four of five subscores, see Table 1A. The age and gender-adjusted leptin levels were 21.6 ng/ml (95% CI 18.2-25.0) in the group with no CWP vs. 35.5 ng/ml (95% CI 27.6-43.4) in the CWP group, p=0.002. In a logistic regression adjusting for age and gender, leptin was associated with reporting CWP OR 1.015 (95% CI 1.004-1.027, p= 0.008).Table 1.A Comparisons between those without CWP and those fulfilling CWP and table 1B comparisons between those not having low PPT and those with low PPT.ABNo CWPMean (sd)CWPMean (sd)p-valueNot Low PPTMean (sd)Low PPTMean (sd)p-valuen2104022639Age51.8 (8.7)52.8 (7.6)0.46552.1 (8.5)48.8 (9.9)0.030Gender, female n(%)67900.00472670.524BMI (kg/m2)26.2 (4.6)28.0 (5.0)0.02226.4 (4.9)27.5 (4.3)0.213VFA (cm2)107 (50)137 (56)0.001110 (54)127 (49)0.088Leptin (ng/ml)21.0 (23.9)39.0 (36.6)<0.00123.0 (26.0)31.8 (31.6)0.061CRP (mg/L)1.9 (2.7)2.2 (2.3)0.6022.0 (2.7)1.9 (1.8)0.825KOOSPain (0-100, worst to best)74 (15)61 (17)<0.00173 (15)65 (18)0.002Symptom (0-100, worst to best)72 (17)64 (18)0.01671 (17)67 (19)0.188ADL (0-100, worst to best)84 (13)69 (19)<0.00184 (14)72 (21)<0.001Sport/rec (0-100, worst to best)49 (26)34 (27)0.00149 (26)36 (25)0.009QoL (0-100, worst to best)53 (18)46 (20)0.05053 (18)45 (21)0.017BMI, body mass index; VFA, visceral fat area; CRP, C-reactive protein; KOOS, knee injury and osteoarthritis outcome score; ADL; function in daily living; sport/Rec, Function in sport and recreation; QOL, knee-related Quality of lifeThe participants with low PPT were younger and had a mean (sd) leptin 31.8 ng/ml (31.6) vs 23.0 (26.0), p=0.061 in the group not having low PPT, Table 1B. In a logistic regression adjusting for age and gender, leptin was associated with low PPT OR 1.016 (95% CI 1.004-1.029, p= 0.012).ConclusionThe pathophysiological mechanism causing widespread pain is probably multifactorial, involving both biological and physical factors. The adipokine leptin could be involved in some of these mechanisms, but longitudinal studies are needed to be able to study causal relationships.References[1]Wolfe F, et al. Scand J Pain. 2019;20:77-86.[2]Wolfe F, et al. Arthritis and rheumatism. 1990;33:160-72.Disclosure of InterestsNone declared
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| 9. |
- Andersson, Maria L.E. 1968-, et al.
(författare)
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Associations between chronic widespread pain, pressure pain thresholds and leptin in individuals with knee pain
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Background: Previous studies have reported associations between obesity, chronic pain and increased pain sensitivity. The adipokine leptin has been suggested to be involved in the osteoarthritis process as well as in pain sensitisation.Objective: The aim was to study associations between chronic widespread pain, pain sensitivity and leptin in individuals with knee pain.Method: In all, 306 individuals with knee pain were included in the Halland osteoarthritis cohort, ClinicalTrials.gov NCT04928170. Of those, 265 were included in this cross-sectional baseline study. The mean age (sd) was 51.6 (8.8) years, and 71% was women. The participants marked their painful areas on a pain figure with 18 predefined areas. According to their answer, they were categorised in three different pain groups according to the modified WP2019 definition (1), with knees excluded (due to highest goodness of fit): Chronic widespread pain (CWP), chronic regional pain (ChRP) if CWP was not met, and no chronic pain (NCP). The groupwith CWP were compared with those reporting no CWP (ChRP and NCP). The pressure pain thresholds (PPT) were measured using a computerised pressure algometry (AlgoMed, Medoc) on eight predefined tender points (trapezius (bilateral), right second rib, right lateral epicondyle, knees, gluteal (bilateral)) out of the total 18 points that are part of the definition of fibromyalgia (2). Increased pain sensitivity was defined as having PPT in the lowest third in all tender points. Obesity was measured via waistline measurement and a bioimpedance (InBody 770) measuring BMI, visceral fat area (VFA), and body fat percentage. Serum-Leptin were analysed with an ELISA method (Alpco). C-reactive protein (CRP) >1.0 mg/L were measured according to the current laboratory standards in Sweden. CRP below 1.0 mg/L, were further analysed with a sensitive CRP enzyme-linked immunosorbent assay (ELISA) method (Abnova). Knee Injury and Osteoarthritis Outcome Score (KOOS) was used to describe the groups.Result: In this baseline study, 16% reported CWP, and 15% had low pain pressure thresholds at baseline in the study. Those fulfilling CWP were more often women, had higher BMI, VFA, and increased leptin levels and worse KOOS in four of five subscores, see table 1A. The age and gender-adjusted leptin levels were 21.6 ng/ml (95% CI 18.2-25.0) in the group with no CWP vs. 35.5 ng/ml (95% CI 27.6-43.4) in the CWP group, p=0.002. In a logistic regression adjusting for age and gender, leptin was associated with reporting CWP OR 1.015 (95% CI 1.004-1.027, p= 0.008).The participants with low PPT were younger and had a mean (sd) leptin 31.8 ng/ml (31.6) vs 23.0 (26.0), p=0.061 in the group not having low PPT, table 1B. In a logistic regression adjusting for age and gender, leptin was associated with low PPT OR 1.016 (95% CI 1.004-1.029, p= 0.012).There were no increased CRP levels in any of the pain groups (CWP and low PPT), table 1A and B.Conclusion: The pathophysiological mechanism causing widespread pain is probably multifactorial, involving both biological and physical factors. The adipokin leptin could be involved in some of these mechanisms, but longitudinal studies are needed to be able to study causal relationships.
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| 10. |
- Andersson, Maria L.E. 1968-, et al.
(författare)
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Associations between chronic widespread pain, pressure pain thresholds, leptin, and metabolic factors in individuals with knee pain
- 2023
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Ingår i: BMC Musculoskeletal Disorders. - London : BioMed Central (BMC). - 1471-2474. ; 24:1
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: The aim was to study associations between chronic widespread pain, widespread pain sensitivity, leptin, and metabolic factors in individuals with knee pain. A secondary aim was to study these associations in a subgroup of individuals with normal BMI.METHOD: This cross-sectional study included 265 individuals. The participants were categorised into three different pain groups: Chronic widespread pain (CWP), chronic regional pain (ChRP), or no chronic pain (NCP). The pressure pain thresholds (PPTs) were assessed using computerised pressure algometry. Low PPTs were defined as having PPTs in the lowest third of all tender points. Leptin and metabolic factors such as BMI, visceral fat area (VFA), lipids, and glucose were also assessed.RESULT: Sixteen per cent reported CWP, 15% had low PPTs, and 4% fulfilled both criteria. Those who fulfilled the criteria for CWP were more often women, more obese, and had increased leptin levels. In logistic regression, adjusted for age and gender, leptin was associated with fulfilling criteria for CWP, OR 1.015 (95% CI 1.004-1.027, p = 0.008). In logistic regression, adjusted for age and gender, leptin was associated with low PPTs, OR 1.016 (95% CI 1.004-1.029, p = 0.012). Leptin was also associated with fulfilling both criteria, adjusted for age, sex, and visceral fat area (VFA), OR 1.030 (95% CI 1.001-1.060), p = 0.040.CONCLUSION: Leptin was associated with fulfilling the combined criteria for chronic widespread pain and low PPTs, even after adjusting for the visceral fat area (VFA). Longitudinal studies are needed to study the causal relationships between leptin and the development of widespread pain.
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