Cohorts in SIMPLER

Tidslinje för enkäter i kohorterna SMC och COSM.
Time line for questionnaires in the cohorts.

A description of the cohorts is published by Harris et al. in 2013, (PDF) The Swedish mammography cohort and the cohort of Swedish men: study design and characteristics of two population-based longitudinal cohorts. Please note a wrong number in figure 1 for SMC at 1997 follow up after exclusions, it should be 38 984 instead of 39 984.

For a short overview of the cohorts you may explore this summary in excel with numbers on respondents and exclusions.

Participants SMC and COSM
Questionnaire SMC COSM
1987 61 433
1997 38 984 45 906
2008 Health questionnaire 30 621 29 503
2009 Lifestyle questionnaire 25 332 26 100
2019 Health questionnaire 19 081 18 916
2019 Lifestyle questionnaire 14 923 16 166

Please read questionnaires and variable list for exact formulation of questions and variables. 

Participants in the clinical cohorts
SMC clinical subcohort Uppsala SMC clinical subcohort Västerås COSM clinical subcohort Västerås COSM clinical subcohort Örebro
Cycle 1 N=5 032, collected 2003-2009 N=2 630, collected 2010-2019 N=4 750, collected 2010-2019 N=602, collection started 2014 and ongoing
Cycle 2 N=1 232, collection started May 2015 and ongoing Started October 2022 Started October 2022
85+, home visit N=307, collected 2012-2013 N=87, collected 2013-2014
*Sampling at Karolinska Institutet *N=82, collected 2014 *N=25, collected 2014

*Residents in Västmanland or Örebro County at start of Swedish Mammography Cohort 1987 and Cohort of Swedish Men 1997, who had moved to and were living in Stockholm at time of invitation to participate in the clinical subcohort.

**Number of cases of death and different diseases after cohort entry
SMC, 1987-2020 COSM, 1997-2020 SUM
Death 30 290 22 101 52 391
Cancer 16 398 13 923 30 321
CVD 42 259 32 203 74 462
IHD 12 387 12 965 25 352
Ami 6 890 7 025 13 915
Stroke 9 223 7 033 16 256
Heart failure 12 055 9 140 21 195
Diabetes 10 116 8 846 18 962
Fracture, all 23 309 10 249 33 558
Hip fracture 7 894 2 840 10 734
Cataract extraction 20 279 11 147 31 426

** The table show total number of outcomes. Number of incident cases varies with type of analysis.

Last modified: 2024-01-22