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Table 3 The association between BMI at enrollment and end-stage renal disease in the southern community cohort study, overall and stratified by race

From: Increased body mass index may be associated with greater risk of end-stage renal disease in whites compared to blacks: a nested case–control study

  Overall Whites Blacks
  Cases Controls ORa 95 % CI Cases Controls ORa 95 % CI Cases Controls ORa 95 % CI
  N = 620 N = 1881    N = 65 N = 196    N = 555 N = 1685   
BMI Category         
Underweight 7 14 1.27 0.49, 3.28 1 1 3.54 0.18, 69.17 6 13 1.06 0.39, 2.92
Normal 141 382 1.00 N/A 11 47 1.00 (referent) N/A 130 335 1.00 (referent) N/A
Overweight 167 553 0.83 0.64, 1.08 12 56 0.99 0.38, 2.59 155 497 0.81 0.61, 1.07
Obese 305 932 0.89 0.69, 1.14 41 92 2.17 0.94, 4.98 264 840 0.80 0.61, 1.05
 Obese I 111 431 0.72 0.53, 0.96 16 48 1.63 0.65, 4.17 95 383 0.65 0.47, 0.88
 Obese II 96 271 0.97 0.70, 1.33 13 23 2.62 0.96, 7.12 83 248 0.86 0.61, 1.22
 Obese III 98 230 1.21 0.86, 1.69 12 21 3.31 1.08, 10.12 86 209 1.09 0.76, 1.55
  1. Abbreviations: BMI Body Mass Index, CI Confidence Interval, OR odds ratio, N/A not applicable
  2. P value for race × continuous BMI interaction term (test for additivity) in adjusted model = 0.03 (in the unadjusted model, the P value = 0.02)
  3. aAdjusted for education (<high school, completed high school, vocational training or junior college and ≥ college degree)), and smoking history (never, former and current). Age, gender and race were matching factors in the conditional logistic models