Table 3.

Differences in dietary patterns according to the different sociodemographic characteristics

Variables	Dietary Patterns (N = 12,212, %)					χ2
	Class 1	Class 2	Class 3	Class 4	Class 5
Sex						47.839**
Male	11.60	7.41	20.73	45.23	15.04
Female	9.59	8.89	24.19	44.68	12.64
Age (years)						225.631**
18–29	12.21	8.44	27.46	39.00	12.89
30–44	10.28	7.61	24.59	45.31	12.21
45–59	9.72	8.10	17.29	48.42	16.47
60–65	14.92	9.07	9.07	49.40	17.54
Marital status						69.235**
Married	10.78	8.08	20.92	46.68	13.53
Unmarried	10.63	7.87	26.87	38.77	15.85
Education level						490.523**
Primary school and below	9.62	9.76	8.27	49.73	22.63
Secondary school	11.55	8.18	13.26	50.02	16.80
High school	14.09	8.85	19.21	44.71	13.14
Post-secondary school and above	8.92	7.35	29.78	41.99	11.95
Monthly income (RMB)						213.182**
No income	9.37	9.50	17.71	41.59	21.82
< 1,000	15.98	8.76	11.36	44.38	19.53
1,000–3,000	11.73	8.43	20.28	45.40	14.16
3,000–5,000	10.31	7.90	20.28	45.40	14.15
> 5,000	8.98	7.90	22.88	46.08	12.82
BMI						24.645*
Underweight	8.83	7.59	24.00	44.14	15.45
Normal weight	11.38	8.39	21.43	45.05	13.76
Overweight	10.11	7.77	22.71	45.53	13.89
Obese	9.33	6.18	25.62	42.97	15.90
Chronic disease						256.867**
Yes	4.73	5.86	24.65	47.40	17.37
No	13.21	8.92	21.19	44.02	12.66

BMI: body mass index; *P < 0.05, **P < 0.001