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Table 1 Distribution of participants by age and sex in the source population, the initial random sample and the CoLaus Study participants.

From: The CoLaus study: a population-based study to investigate the epidemiology and genetic determinants of cardiovascular risk factors and metabolic syndrome

 

Source population (n = 56,694)

Random sample (n = 19,830)

CoLaus Study (n = 6,188)

Women (%)

30,141 (53.4)

10,601 (53.5)

3,251 (52.5)

P value

 

0.79

0.08

Age (years)

52.0 ± 11.6

50.8 ± 11.5

51.1 ± 10.9

P value

 

<0.001

<0.001

Age group

   

   35–44

18.877 (33.4)

7,265 (36.6)

2,051 (33.1)

   45–54

14,614 (25.9)

5,202 (26.2)

1,682 (27.2)

   55–64

12.484 (22.1)

4,417 (22.3)

1,657 (26.8)

   65–75

10,524 (18.6)

2,946 (14.9)

798 (12.9)

P value

 

<0.001

<0.001

  1. Results are expressed as number of subjects and (percentage) or as mean ± SD. Statistical analysis by Student's t-test or chi-square test compared to the source population