. Author manuscript; available in PMC: 2018 Sep 1.

Published in final edited form as: BJOG. 2017 Apr 10;124(10):1547–1555. doi: 10.1111/1471-0528.14630

Table 2.

Association between antral follicle counts (AFC) and protein intake in 265 women.

Adjusted Mean Antral Follical Count (95% Confidence Intevals) by Protein Intake
	Q1	Q2	Q3	Q4	Q5	P- trend¹
Subject, N	53	53	53	53	53
Total protein intake (% energy)
Range:	10.35,14.44	14.48,15.96	15.98,17.02	17.03,18.73	18.76,26.14
MDLl²	14.8 (13.8, 15.8)	13.0 (12.0, 14.0)^*	13.2 (12.2, 14.2)^*	13.8 (12.8, 14.8)	14.1 (13.2, 15.2)	0.90
MDL2³	14.7(13.7, 15.8)	13.0 (12.0, 14.0)^*	13.1 (12.1, 14.1)^*	13.8 (12.9, 14.9)	14.2 (13.2, 15.3)	0.97
Vegetable protein intake (% energy)
Range:	2.14,5.00	5.05,5.83	5.84,6.60	6.62,7.51	7.52,15.16
MDL1⁴	13.8 (12.7, 14.9)	13.4 (12.5, 14.5)	14.0 (13.0, 15.1)	13.8 (12.8, 14.8)	13.8 (12.8, 15.0)	0.84
MDL2⁵	14.1 (13.0, 15.4)	13.7 (12.6, 14.9)	14.3 (13.2, 15.5)	14.1 (13.1, 15.3)	14.1 (13.0, 15.4)	0.86
Animal protein intake (% energy)
Range:	0.16,7.84	7.86,9.48	9.49,10.89	10.89,12.98	12.99,22.01
MDL1⁶	14.9 (13.7, 16.1)	12.9 (12.0, 13.9)^*	13.5 (12.5, 14.5)	14.5 (13.5, 15.6)	13.1 (12.1, 14.1)^*	0.27
MDL2⁷	14.9 (13.7, 16.2)	12.8 (11.9, 13.8)^*	13.4 (12.4, 14.4)	14.5 (13.5, 15.6)	13.1 (12.1, 14.2)^*	0.31
Dairy protein intake (% energy)
Range:	0.00,2.31	2.33,3.20	3.21,4.12	4.12,5.24	5.24,9.27
MDL1⁸	14.5 (13.5, 15.7)	13.4 (12.5, 14.5)	13.7 (12.7, 14.7)	14.8 (13.7, 15.9)	12.4 (11.5, 13.5)^*	0.04
MDL2⁹	14.8 (13.7, 16.0)	13.7 (12.6, 14.8)	13.9 (12.8, 15.1)	14.9 (13.8, 16.2)	12.6 (11.6, 13.8)^*	0.04
Non-dairy animal protein intake (% energy)
Range:	0.03,4.12	4.15,5.57	5.58,7.13	7.15,8.98	9.01,21.04
MDL1¹⁰	13.7 (12.7, 14.9)	13.4 (12.4, 14.4)	13.8 (12.8, 14.8)	13.7 (12.7, 14.7)	14.2 (13.2, 15.3)	0.48
MDL2¹¹	14.0 (12.8, 15.3)	13.5 (12.5, 14.7)	14.0 (13.0, 15.2)	14.0 (12.9, 15.2)	14.6 (13.4, 15.8)	0.42

Estimated using median intake in each quartile as a continuous variable;

Model (MDL) 1: adjusted for total energy intake (TEI), age, and total fat intake (TFI);

Model 2: adjusted for TEI, TFI, age, BMI, smoking status (ever vs. never), race (white vs non-white);

⁴

Model 1: adjusted for TEI, TFI, age, and animal protein intake (PI);

⁵

Model 2: adjusted for TEI, TFI, age, BMI, smoking status (ever vs. never), race (white vs non-white), and animal PI;

⁶

Model 1: adjusted for TEI, TFI, and vegetable PI;

⁷

Model 2: adjusted for TEI, TFI, age, BMI, smoking status (ever vs. never), race (white vs non-white), and vegetable PI;

⁸

Model 1: adjusted for TEI, TFI, age, non-dairy PI, and vegetable PI;

⁹

Model 2: adjusted for TEI, TFI, age, BMI, smoking status (ever vs. never), race (white vs. non-white), non-dairy PI and vegetable PI;

¹⁰

Model 1: adjusted for TEI, TFI, age, dairy PI and vegetable PI;

¹¹

Model 2: adjusted for TEI, TFI, age, BMI, smoking status (ever vs. never), race (white vs. non-white), dairy PI and vegetable PI;

P-value for trend <0.05 compared to women in the lowest quartile of PI.