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Table 1 Socio-demographic characteristics and self-reported prevalence of chronic conditions in the study population

From: Multimorbidity and health-related quality of life in the older population: results from the German KORA-Age study

Variable All respondents N = 4,565 Questionnaire respondents N = 3,833 Telephone respondents N = 732
Mean age, years (SD) 73.86 (6.23) 73.44 (6.04) 76.03 (6.70)
Male sex, n (%) 2,198 (48.1%) 1,897 (49.5%) 301 (41.1%)
Education, n (%)    
   Primary 3,328 (70.7%) 2,665 (69.6%) 563 (76.9%)
   Secondary 803 (17.6%) 699 (18.2%) 104 (14.2%)
   Tertiary 532 (11.7%) 467 (12.2%) 65 (8.9%)
Mean BMI, kg/m2 (SD) 27.45 (4.44) 27.39 (4.34) 27.76 (4.93)
Diabetes mellitus, n (%) 798 (17.5%) 652 (17.0%) 146 (20.0%)
Chronic bronchitis, n (%) 297 (6.5%) 241 (6.3%) 56 (7.7%)
Hypertension, n (%) 2,700 (59.2%) 2,240 (58.5%) 460 (63.1%)
Coronary event, n (%) 461 (10.1%) 376 (9.8%) 85 (11.6%)
   Bypass operation, n (%) 178 (3.9%) 147 (3.8%) 31 (4.2%)
   Myocardial infarction (MI), n (%) 395 (8.7%) 325 (8.5%) 70 (9.6%)
   Mean time since last MI, years (SD) 10.49 (8.24) 10.69 (8.32) 9.52 (7.82)
Stroke, n (%) 330 (7.2%) 248 (6.5%) 82 (11.2%)
   Mean time since last stroke, years (SD) 6.72 (6.57) 6.55 (6.45) 7.27 (6.95)
Cancer, n (%) 608 (13.3%) 511 (13.3%) 97 (13.3%)
   Mean time since last diagnosis, years (SD) 8.79 (8.64) 8.58 (8.52) 9.94 (9.26)
  1. SD: standard deviation