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Table 1 Sample description at the follow-up F3 by BMI classes of the Baseline KORA survey S3 (1994/95)

From: Impact of BMI and BMI change on future drug expenditures in adults: results from the MONICA/KORA cohort study

   Baseline: S3 (1994/95)
Follow-up Sample Overall Normal weight Overweight Moderate obesity Severe obesity p-value
       n    (%)b    n    (%)b    n    (%)b    n    (%)b     n    (%)b  
F3 (2004/05) 2,946 100% 1,064 35.9% 1,327 44.8% 434 14.7% 121    4.1%  
Sex Men 1,444 49.0% 368 34.6% 812 61.2% 224 51.6% 40 33.1% <.0001
Women 1,502 51.0% 696 65.4% 515 38.8% 210 48.4% 81 66.9%
Socio-economic status Lower class 463 15.7% 106 10.0% 218 16.4% 96 22.1% 43 35.5% <.0001
Lower middle class 601 20.4% 191 18.0% 258 19.4% 125 28.8% 27 22.3%
Middle class 627 21.3% 247 23.2% 286 21.6% 74 17.1% 20 16.5%
Upper middle class 728 24.7% 305 28.7% 306 23.1% 91 21.0% 26 21.5%
Upper class 527 17.9% 215 20.2% 259 19.5% 48 11.1% 5 4.1%
  Normal weight or underweighta 854 29.0% 737 69.3% 115 8.7% 2 0.5% 0 0% <.0001
BMI group Overweight 1,298 44.1% 316 29.7% 918 69.2% 63 14.5% 1 0.8%  
Moderate obesity 599 20.3% 11 1.0% 284 21.4% 280 64.5% 24 19.8%  
  Severe obesity 195 6.6% 0 0% 10 0.8% 89 20.5% 96 79.3%  
Age (years) Mean (SD) 57.6 (12.8) 52.4 (12.1) 59.9 (12.4) 62.0 (12.0) 62.0 (11.2) <.0001
BMI change Mean (SD) 0.97 (2.1) 1.14 (1.77) 0.88 (2.04) 0.98 (2.57) 0.45 (3.21) 0.0008
  1. Underweight: BMI < 18.5; normal weight: 18.5 ≤ BMI < 25; overweight: 25 ≤ BMI < 30; moderate obesity (obesity class 1): 30 ≤ BMI < 35; severe obesity (obesity class 2–3): BMI ≥ 35.
  2. aPatients who changed to the underweight group during the 10 years (N = 6 formerly normal weight persons) were included in the normal weight group at follow-up (F3).
  3. bColumn percentages per gender/SES are shown.