TABLE 3

β-Coefficients (95% CIs) of the associations between dietary protein intake in 10-g/d increments and insulin resistance in the AHS-2 calibration substudy total population and stratified by waist circumference1

Regression calibrationMultiple linear regression
Total (n = 548)
 Total protein0.11 (0.02, 0. 21)0.07 (0.01, 0.12)
 Animal protein0.11 (0.01, 0.20)0.08 (0.03, 0.14)
 Plant protein0.00 (−0.19, 0.19)0.00 (−0.07, 0.08)
 AP intake ratio1.82 (0.80, 2.84)1.30 (0.65, 1.95)
Normal waist circumference (n = 314)
 Total protein0.10 (−0.03, 0.23)0.07 (−0.001, 0.14)
 Animal protein0.09 (−0.03, 0.23)0.08 (0.01, 0.16)
 Plant protein−0.06 (−0.33, 0.19)−0.01(−0.12, 0.09)
 AP intake ratio2.52 (0.93, 4.11)1.70 (0.80, 2.60)
High waist circumference (n = 234)
 Total protein0.13 (−0.01, 0.27)0.07 (−0.008, 0.15)
 Animal protein0.12 (−0.02, 0.26)0.08 (0.00, 0.15)
 Plant protein0.06 (−0.24, 0.37)0.01 (−0.10, 0.13)
 AP intake ratio1.27 (−0.06, 2.62)0.90 (0.04, 1.85)
  • 1 Values for animal and plant protein were adjusted for age, sex, waist circumference, ethnicity, physical activity, dietary PUFA to SFA ratio, dietary glycemic load, type of dietary protein, and energy. AHS-2, Adventist Health Study 2; AP, animal-to-plant protein.