. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: Cancer Causes Control. 2015 Mar 12;26(4):627–634. doi: 10.1007/s10552-015-0552-1

Table 3. Endometrial Cancer Risk Stratified by Baseline Body Mass Index, California Teachers Study Cohort, 1995-2011.

	Per unit increase			RR^a

Dietary pattern	RR^a	95% CI	P-int^b	Q1	Q2	Q3	Q4	Q5	95%CI^c	P-trend^d	P-int^e
	BMI <25, 427 cases

Plant-based	0.93	0.83, 1.05		1.0	0.91	0.73	1.03	0.78	0.56, 1.10	0.35
High protein/high fat	0.86	0.73, 1.01		1.0	0.97	0.81	0.81	0.90	0.61, 1.33	0.42
High carbohydrate	0.80	0.67, 0.97		1.0	1.04	0.87	0.80	0.82	0.51, 1.31	0.23
Ethnic	1.00	0.91, 1.11		1.0	0.94	1.20	1.06	1.07	0.78, 1.46	0.58
Salad and wine	1.11	1.00, 1.23		1.0	1.70	1.38	1.44	1.73	1.14, 2.61	0.05
	BMI ≥25, 510 cases

Plant-based	1.01	0.91, 1.12	0.97	1.0	1.04	1.01	1.14	1.03	0.75, 1.42	0.76	0.69
High protein/high fat	1.03	0.89, 1.18	0.78	1.0	1.05	1.19	1.24	1.29	0.89, 1.88	0.14	0.43
High carbohydrate	0.99	0.84, 1.16	0.80	1.0	0.93	0.88	0.97	1.00	0.67, 1.50	0.96	0.89
Ethnic	1.04	0.95, 1.14	0.37	1.0	0.82	0.79	0.97	0.98	0.75, 1.30	0.78	0.31
Salad and wine	0.95	0.87, 1.05	<0.01	1.0	1.09	0.99	1.11	0.98	0.72, 1.33	0.84	0.01

BMI, body mass index; CI, confidence interval; P-int, P-interaction; Q, quintile; RR, relative risk

Adjusted for race and its interaction with time-dependent age, age at menarche, gravidity and age at last pregnancy and its interaction with time-dependent age, oral contraceptive use, physical activity, smoking status, height, caloric intake, the other four dietary patterns, and the following time-dependent exposures: BMI, menopausal status/hormone therapy use, and their interaction; age was the time metric and the model was stratified by age at baseline

P-interaction for dietary pattern modeled per unit increase

Associated with the highest quintile

P-trend across quintiles

P-interaction for dietary pattern modeled in quintiles