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Table 1 Characteristics of the study populations ECRHS-I, KORA C and SHIP-I

From: Regional differences in prediction models of lung function in Germany

  ECRHS-I (N = 1162) KORA C (N = 1088) SHIP-1 (N = 1809)
  n/N (%) n/N (%) n/N (%)
Sex (Male) 601/1162 (51.7) 520/1088 (47.8) 885/1809 (48.9)
Age (y)* 41.9 ± 12.3 44.7 ± 9.2 52.5 ± 13.7
Height (cm) 169.8 ± 9.0 170.4 ± 9.3 169.7 ± 9.1
Weight (kg)* 72.9 ± 13.4 74.1 ± 14.2 80.3 ± 15.9
BMI (kg/m2)* 25.2 ± 4.0 25.5 ± 4.1 27.8 ± 4.7
Obesity (BMI ≥ 30)* 139/1162 (12.0) 129/1088 (11.9) 526/1809 (29.1)
Education level*    
   high 243/1158 (21.0) 251/1069 (23.5) 379/1770 (21.4)
   medium 372/1158 (32.1) 295/1069 (27.6) 837/1770 (47.3)
   low 543/1158 (46.9) 523/1069 (48.9) 554/1770 (31.3)
Occupation* 818/1162 (70.4) 808/1086 (74.4) 561/1008 (55.7)
Atopic diseases    
   Atopy status* 320/1162 (27.5) $ 277/1088 (25.5) # 332/1806 (18.4) §
   Asthma* 23/1162 (2.0) # 74/1088 (6.8) # 47/1806 (2.6) $
   Hay fever* 129/1162 (11.1) $ 226/1088 (20.8) # not available
Cardiovascular diseases    
   Hypertension* 265/1066 (24.9) $ 231/1086 (21.3) # 668/1807 (37.0) §
   Heart attack* 43/1150 (3.7) $ 8/1086 (0.7) # 21/1807 (1.2) §
   Stroke* 37/1149 (3.2) $ 10/1086 (0.9) # 19/1807 (1.1) §
Diabetes* 60/1149 (5.2) $ 27/1086 (2.5) # 125/1808 (6.9) §
Menstruation* 287/454 (63.2) 385/568 (67.8) 399/770 (51.8)
Smoking status*    
   never 491/1162 (42.3) 425/989 (43.0) 787/1808 (43.5)
   current 393/1162 (33.8) 277/989 (28.0) 431/1808 (23.8)
   former 278/1162 (23.9) 287/989 (29.0) 590/1808 (32.6)
ETS* 473/1158 (40.9) 287/1088 (26.4) 247/1008 (24.5)
Packyears (y)* 13.2 ± 12.0 13.7 ± 14.5 12.8 ± 12.0
   current 15.2 ± 12.3 17.8 ± 14.3 15.0 ± 12.9
   former 10.3 ± 11.0 9.8 ± 13.7 11.2 ± 11.1
Medication* 61/1162 (5.2) 66/618 (10.7) 188/1285 (14.6)
  1. Mean ± standard deviation values are given, or proportions and corresponding percentages (in parentheses). Chi-square and Kruskal-Wallis tests were performed to see significant differences; * p < 0.05
  2. Diseases: # ever doctor-diagnosed; §doctor-diagnosed during the last 5 years; $ self-reported, not necessarily doctor-diagnosed; Atopy status: at least one doctor-diagnosed atopic disease
  3. BMI: body mass index; ETS: environmental tobacco smoke; Medication: at least one drug influencing lung function