Table 3. Intake of main food groups for study population in Guangzhou, China^a.

	Men (148 pairs)		p	Women (433 pairs)		p
	Cases	Controls		Cases	Controls
Dietary energy, kcal/d	1388±345	1402±385	0.668	1274±381	1323±360	0.044
Cereals	699±121	689±148	0.513	656±134	630±136	0.001
Soy protein	3.11±3.99	4.67±4.71	0.001	2.36±3.06	3.44±3.73	<0.001
Vegetables	232±106	289±130	<0.001	241±120	288±130	<0.001
Fruits	39.8±30.6	66.6±56.8	<0.001	52.7±42.9	67.3±57.7	<0.001
Milk and dairy products	46.7±71.6	77.1±101.9	0.002	71.6±113.4	95.4±94.7	<0.001
Nuts	9.28±10.52	12.42±13.71	0.023	6.75±11.03	11.66±16.65	<0.001
Meat	87.7±51.9	63.2±31.5	<0.001	80.2±52.7	64.0±39.6	<0.001
Poultry	22.6±16.5	17.8±12.3	0.004	19.0±15.0	19.6±16.8	0.629
Total fish	26.2±22.9	34.5±26.5	0.002	26.4±22.3	34.6±33.3	<0.001
Freshwater fish	16.4±15.3	17.6±17.2	0.490	17.0±16.1	22.5±32.0	0.001
Sea fish	4.94±11.64	11.28±17.92	<0.001	5.72±12.00	8.62±13.75	0.001
Mollusca and shellfish	4.57±7.97	5.57±8.93	0.200	3.39±6.98	3.71±5.94	0.463

Continuous variables were described by means ±SD and evaluated by t-test.

^aMean intakes of food groups were adjusted for daily energy intake using the residual method. The mean of daily energy intake was 1355 kcal (male) or 1278 kcal (female).