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Table 2 Odds ratio (95% confidence intervals) of incident chronic kidney disease according to tertiles of dietary exposures

From: A prospective study on total protein, plant protein and animal protein in relation to the risk of incident chronic kidney disease

  Tertiles of dietary intake
T1 T2 T3 P for trend
Total Protein n = 544(CKD = 82) n = 542(CKD = 66) n = 544(CKD = 71)  
 Model 1 1.00 0.75 (0.52–1.09) 0.79 (0.54–1.14) 0.197
 Model 2 1.00 0.67 (0.44–1.03) 0.62 (0.34–1.12) 0.090
 Model 3 1.00 0.67 (0.44–1.02) 0.59 (0.32–1.07) 0.066
 Model 4 1.00 0.67 (0.44–1.02) 0.59 (0.32–1.08) 0.071
 Model 5 1.00 0.65 (0.43–1.00) 0.59 (0.32–1.08) 0.067
Plant Protein n = 543(CKD = 90) n = 544(CKD = 70) n = 543(CKD = 59)  
 Model 1 1.00 0.80 (0.56–1.14) 0.61 (0.42–0.90) 0.012
 Model 2 1.00 0.63 (0.42–0.94) 0.41 (0.23–0.71) 0.001
 Model 3 1.00 0.55 (0.36–0.84) 0.29 (0.15–0.55) <  0.001
 Model 4 1.00 0.55 (0.36–0.83) 0.29 (0.15–0.55) <  0.001
 Model 5 1.00 0.55 (0.36–0.83) 0.28 (0.14–0.53) <  0.001
Animal protein n = 544(CKD = 73) n = 542(CKD = 74) n = 544(CKD = 72)  
 Model 1 1.00 0.95 (0.66–1.37) 0.91 (0.62–1.32) 0.626
 Model 2 1.00 0.93 (0.63–1.38) 0.93 (0.59–1.46) 0.745
 Model 3 1.00 0.94 (0.64–1.38) 0.91 (0.57–1.44) 0.686
 Model 4 1.00 0.94 (0.63–1.38) 0.91 (0.57–1.45) 0.699
 Model 5 1.00 0.94 (0.63–1.38) 0.91 (0.57–1.44) 0.681
  1. P for trend across tertiles calculated with the exposure modelled as a continuous variable
  2. Model 1: crude
  3. Model 2: adjusted for age, sex, smoking, total energy intake, physical activity, BMI
  4. Model 3: additionally adjusted for total fiber intake and energy percent from fat
  5. Model 4: additionally adjusted for diabetes mellitus and hypertension
  6. Model 5: additionally adjusted for FBS and systolic BP instead of diabetes and hypertension