Table 1 Basic information of the used claims data

Total number of insured persons

4 048 709

3 931 988

3 906 411

3 954 172

Age in years (mean)

43.0

43.5

43.7

43.7

Sex (men & women)

47.1 % & 52.9 %

47.0 % & 53.0 %

47.1 % & 52.9 %

47.2 % & 52.8 %

Number of persons insured permanently over the respective year (study population)

3 538 793

3 483 739

3 459 461

3 492 326

Proportion of the included study population compared to total number of insured persons (%)

87.4 %

88.6 %

88.6 %

88.3 %

Age in years (mean)

44.4

44.8

40.0

45.0

Sex (men & women)

46.2 % & 53.8 %

46.3 % & 53.7 %

46.4 % & 53.6 %

46.4 % & 53.6 %