Table 4

Crude and adjusted OR of the associations between dietary pattern and two latent classes of mental health problems in a sample of Iranian manufacturing employees

	Western dietary pattern scores					Healthy dietary pattern scores					Traditional dietary pattern scores
	Tertile 2*		Tertile 3*		P trend	Tertile 2*		Tertile 3*		P trend	Tertile 2*		Tertile 3*		P trend
	OR	95% CI	OR	95% CI	P trend	OR	95% CI	OR	95% CI	P trend	OR	95% CI	OR	95% CI	P trend
Crude model	1.53	1.10 to 2.13	1.64	1.18 to 2.27	0.004	0.71	0.52 to 0.97	0.64	0.47 to 0.87	0.004	1.09	0.78 to 1.51	1.42	1.04 to 1.94	0.026
Model I	1.53	1.10 to 2.15	1.69	1.21 to 2.38	0.003	0.72	0.53 to 0.98	0.64	0.47 to 0.87	0.004	1.1	0.79 to 1.53	1.5	1.10 to 2.05	0.011
Model II	1.53	1.09 to 2.14	1.66	1.17 to 2.34	0.005	0.73	0.54 to 0.99	0.66	0.48 to 0.91	0.01	1.12	0.80 to 1.56	1.52	1.10 to 2.10	0.01
Model III	1.53	1.09 to 2.15	1.66	1.18 to 2.35	0.005	0.74	0.54 to 1.01	0.67	0.49 to 0.92	0.013	1.12	0.81 to 1.57	1.52	1.10 to 2.11	0.01

Logistic regression models were used to estimate ORs with 95% CIs.
Model I: adjusted for demographic variables, that is, age, gender, marital status, educational level and family size.
Model II: adjusted for demographic variables and lifestyles factors, that is, sleep duration, physical activity, body mass index and smoking.
Model III: adjusted for all variables in model II and job-related characteristics, that is, shift work, second job and the effort to reward ratio.
*The first tertile is the reference category in the logistic regression model.