The Malmö Diet and Cancer Study: representativity, cancer incidence and mortality in participants and non-participants

Manjer, JonasLund University,Lunds universitet,Kirurgi,Forskargrupper vid Lunds universitet,Surgery,Lund University Research Groups (author)

In order to investigate potential selection bias in population-based cohort studies, participants (n = 28098) and non-participants (n = 40807) in the Malmo Diet and Cancer Study (MDCS) were compared with regard to cancer incidence and mortality. MDCS participants were also compared with participants in a mailed health survey with regard to subjective health, socio-demographic characteristics and lifestyle. Cancer incidence prior to recruitment was lower in non-participants, Cox proportional hazards analysis yielded a relative risk (RR) with a 95% confidence interval of 0.95 (0.90-1.00), compared with participants. During recruitment, cancer incidence was higher in non-participants, RR: 1.08 (1.01-1.17). Mortality was higher in non-participants both during, 3.55 (3.13-4.03), and following the recruitment period, 2.21 (2.03-2.41). The proportion reporting good health was higher in the MDCS than in the mailed health survey (where 74.6% participated), but the socio-demographic structure was similar. We conclude that mortality is higher in non-participants than in participants during recruitment and follow-up. It is also suggested that non-participants may have a lower cancer incidence prior to recruitment but a higher incidence during the recruitment period.

Carlsson, S (author)
Elmståhl, SölveLund University,Lunds universitet,Geriatrik,Forskargrupper vid Lunds universitet,Geriatric Medicine,Lund University Research Groups(Swepub:lu)smi-sel (author)
Gullberg, BoLund University,Lunds universitet,Nutritionsepidemiologi,Forskargrupper vid Lunds universitet,Nutrition Epidemiology,Lund University Research Groups(Swepub:lu)smi-bgu (author)
Janzon, LarsLund University,Lunds universitet,Kardiovaskulär forskning - epidemiologi,Forskargrupper vid Lunds universitet,Cardiovascular Research - Epidemiology,Lund University Research Groups(Swepub:lu)smi-lja (author)
Lindstrom, MLund University,Lunds universitet,Socialmedicin och hälsopolitik,Forskargrupper vid Lunds universitet,Social Medicine and Health Policy,Lund University Research Groups(Swepub:lu)ekh-ml0 (author)
Mattisson, IréneLund University,Lunds universitet,Internmedicin - epidemiologi,Forskargrupper vid Lunds universitet,Internal Medicine - Epidemiology,Lund University Research Groups(Swepub:lu)medf-ima (author)
Berglund, GöranLund University,Lunds universitet,Internmedicin - epidemiologi,Forskargrupper vid Lunds universitet,Internal Medicine - Epidemiology,Lund University Research Groups(Swepub:lu)medf-gbe (author)
KirurgiForskargrupper vid Lunds universitet (creator_code:org_t)

By the author/editor: Manjer, Jonas; Carlsson, S; Elmståhl, Sölve; Gullberg, Bo; Janzon, Lars; Lindstrom, M; show more...; Mattisson, Iréne; Berglund, Göran; show less...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cancer and Oncol ...

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