Table 2:

Dietary intake of participants by categories of dietary protein intakes (% of total energy): Tehran Lipid and Glucose Study¹

	Men (n, 845)					Women (n, 1043)
	Q1	Q2	Q3	Q4		Q1	Q2	Q3	Q4
Energy intake (kcal/d)	2446±45	2411±45	2368±45	2349±45		2271±36	2210±36	2214±36	2129±36*
Carbohydrate (% of E)	59.7±0.5	59.9±0.5	59.4±0.5	57.4±0.5*		56.5±0.4	57.5±0.4	57.3±0.4	54.9±0.4*
Fat (% of E)	31.4±0.4	29.5±0.4	28.9±0.4	28.7±0.4*		35.1±0.4	32.6±0.4	31.4±0.4	31.2±0.4*
Protein (% of E)	11.1±0.1	12.9±0.1	14.1±0.1	16.5±0.1*		10.7±0.1	12.8±0.1	14.2±0.1	16.8±0.1*
Protein (g/kg BW)	0.86±0.01	1.0±0.01	1.1±0.01	1.25±0.01		0.89±0.01	1.06±0.01	1.19±0.01	1.38±0.01
Protein to carbohydrate ratio	0.08±0.003	0.10±0.003	0.11±0.003	0.13±0.003*		0.09±0.003	0.11±0.03	0.13±0.003	0.16±0.003*
Saturated fat (% of E)	9.6±0.5	9.9±0.5	10.9±0.5	9.9±0.4		10.5±0.2	10.7±0.2	10.7±0.2	11.2±0.2
Mono-unsaturated fat (% of E)	11.1±0.2	10.1±0.2	9.8±0.2	9.8±0.2*		12.5±0.2	11.2±0.2	10.8±0.2	10.6±0.2*
Poly-unsaturated fat (% of E)	7.4±0.1	6.2±0.1	5.7±0.1	5.6±0.1*		8.3±0.1	6.9±0.1	6.3±0.1	5.8±0.1*
Total fiber (g/d)	40.3±1.4	42.0±1.4	40.4±1.4	40.2±1.4		34.3±0.9	37.7±0.9	37.6±0.9	34.7±0.9*

¹ Data are age-adjusted mean ± SEM of participant’s dietary intakes across quartiles of dietary protein intakes using Chi square test or linear regression models with adjustment for age.

Dietary protein intakes (% of energy) in 1^st, 2^nd, 3^rd and 4^th quartiles were <12.24, 12.24-13.45, 13.46-14.84, and >14.84 in men, and <11.9, 11.9-13.5, 13.6-15.0, and >15.1 in women, respectively.

^*P for trend<0.05 (A linear trend test was performed by considering each ordinal score variable as a continuous variable in the model)