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Table 3 Completeness (%) of selected variables in LIFE-Adult participants and short questionnaire participants by sex and age

From: Evaluating selection bias in a population-based cohort study with low baseline participation: the LIFE-Adult-Study

  Men Women
Age, years 40 to 49 50 to 59 60 to 69 70 to 79 40 to 49 50 to 59 60 to 69 70 to 79
School education
 LIFE-Adult participants 100 100 99.9 99.7 100 99.9 99.9 100
 SQ participants 93.8 93.5 93.9 93.9 96.4 95.7 95.1 91.9
Employment
 LIFE-Adult participants 100 99.9 99.6 99.9 100 99.9 99.7 99.9
 SQ participants 95.2 95.5 96.5 97.1 96.9 96.9 97 95.5
Cigarette smoking
 LIFE-Adult participants 97.4 95.3 94.0 89.9 97.8 97.2 95.1 86.8
 SQ participants 95.2 94.7 95.8 96.8 96.4 96.8 94.6 94.0
Physical condition
 LIFE-Adult participants 97.9 96.4 94.4 87.6 98.5 96.6 91.7 85.5
 SQ participants 97.2 96.6 96.8 97.7 97.9 97.5 97.0 95.0
Myocardial infarction
 LIFE-Adult participants 98.7 99.4 98.8 98.6 99.7 99.1 99.6 98.9
 SQ participants 95.8 97.5 96.3 96.5 97.7 97.3 96.9 94.8
  1. Completeness is defined as the number of non-missing data divided by the total number of the sample. Sample 2 of LIFE-Adult participants (see Fig. 1) was used. SQ = short questionnaire