| 1. |
- Swedberg, Yngve, et al.
(författare)
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A 15-year series analysis of caries development related to a socioeconomic variable. A study of the year group leaving the organised dental care in Göteborg, Sweden.
- 2003
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Ingår i: Swedish dental journal. - 0347-9994. ; 27:3, s. 151-8
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Tidskriftsartikel (refereegranskat)abstract
- In a long-term series analysis the study had the aim of detecting how the used socioeconomic variables were related to the caries status development in the year group leaving the organised dental care. The study included caries epidemiological records of individuals at the Public Dental Service of Göteborg, leaving the organised dental care during 1986-2000. The City of Göteborg was divided into four districts. One incidence and one prevalence caries index was used, each presented in two subgroups: individuals with no caries record and patients with 20% of the highest index values. The socio-economical variable was individuals 18-64 years of age, seeking employment, as a percentage of the corresponding group of all inhabitants. The registered values were divided into three time sections of five years each. In the first, the socio-economic value curves were almost horizontal, in the second they showed a considerable increasing and in the third a declining tendency. The result curves for the caries-free patient groups and for patients with 20% of the highest caries index values compared to the three socioeconomical time sector results, showed an almost horizontal level concerning the incidence index values, and for the prevalence index values an inclined curve structure to the incidence curves. The result curves for the incidence index with respect to the caries-free patient group showed an almost horizontal structure, while the prevalence curves inclined towards the incidence curves during the study period. The linear structure of these curves deviated considerably from the result curves for the socio-economic time series. No correlation existed between the socio-economic data and the studied caries index values. The need for determining the time length concerning caries index observations was discussed. It must be of special interest to maintain the dental health of the studied patient group and the individuals' relation to regular dental care, when as adults they meet the dental care economy.
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| 2. |
- Swedberg, Yngve, et al.
(författare)
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Analysis of caries status development in relation to socio-economic variables using a case-based system.
- 2001
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Ingår i: Swedish dental journal. - 0347-9994. ; 25:2, s. 81-8
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to detect, using case-based reasoning (CBR) induction methods in time series analysis, how measurable socio-economical adjustments were related to the caries status development. The study concerned the year classes leaving the organised dental care for the time period 1987-95, and had received dental care at the Public Dental Service of Göteborg. The results, as presented by a caries incidence index, indicated that at least one socioeconomical factor, individuals seeking employment, was of importance for the caries status development, a factor with an increase of considerable proportions since 1990. The findings indicated that the other socio-economic variables used did not have the same importance for the caries status development. One feasible explanation is that these factors reflect more upon the social family situation than the economical. If the caries status reflects the social situation of the individual more than the economical, this argument will elucidate the reasoning. Using CBR for the analysis of relationships between oral disease and parameters possibly influencing health development has proven to be a valuable tool and complement to more traditional statistical methods. The analysis can make relationships explicit through the hierarchic knowledge trees and also show redundant information, attributes not appearing in the trees.
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| 3. |
- Swedberg, Yngve, et al.
(författare)
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Caries extreme groups among adolescents, leaving organised dental care in Göteborg, Sweden.
- 1997
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Ingår i: Swedish dental journal. - 0347-9994. ; 21:6, s. 221-6
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Tidskriftsartikel (refereegranskat)abstract
- The aim was--in a longitudinal respect--to study whether 15-year-old children, in caries-free groups, and groups with high frequency of carious lesions, had a stable caries development from 15 to 19 years of age, when they left the organised Public Dental Care. Caries index values were analysed for the period 1986/7-1990/1 for patients born 1971-72 and residing in Göteborg. The groups of caries-free children seemed to be stable in their dental health in about 60-70% according to the prevalence indices used; and about 80% according to the incidence index DS-a. The caries prevalence index mean values of the 15-year-old patient groups with high frequencies of lesions showed between 1.5 to 3.5 percentile units higher mean values when the individuals were 19 years of age. However, the corresponding caries incidence index values were as low as half the size, indicating a possible treatment effect of the caries prevention programme used. Related to the DFS-a index, the 20% groups with the highest caries index values were registered for about 80% of all approximal lesions, of special interest for dental care costs.
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| 4. |
- Swedberg, Yngve, et al.
(författare)
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On longitudinal caries index data. A comparison study between cohort and cross-sectional attempts.
- 1997
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Ingår i: Swedish dental journal. - 0347-9994. ; 21:5, s. 205-11
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to compare registered data of caries prevalence and incidence from cross-sectional studies of specified age groups with the corresponding caries data from cohorts of individuals receiving dental health service from the same dental clinic during the years studied. The study covered two 15-19-year groups, who had been offered complete dental care from three years of age in the City of Göteborg for the time periods 1986/7-1990/1. When compared, the longitudinal cohort attempts often gave statistically significant different values to those of the cross-sectional year classes, which should be considered when presenting caries index mean values in dental health reviews. It is not indifferent to choose between longitudinal cohort and cross-sectional year class attempts when searching for dental health treatment effects. Due to the advantages of using longitudinal cohort study methods, and with regard to the differences of the study design used, as pointed out in the study, the use of longitudinal cohort patient material, extracted from cross-sectional epidemiological data bases, could favour analysis of the effects of different preventive dental care programs.
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