Table 2 The results of univariate analysis

Sex

 Men

728 (68.16%)

Ref

 Women

340 (31.84%)

1.00 (0.77, 1.29)

Age

 < 40 year

278 (26.03%)

Ref

 40–60

674 (63.11%)

1.00 (0.76, 1.33)

 ≥ 60

116 (10.86%)

0.86 (0.56, 1.33)

Education level

 Primary school and less than

89 (8.33%)

Ref

 Junior middle and high school

425 (39.79%)

1.35 (0.85, 2.14)

 Junior college or above

554 (51.87%)

1.17 (0.75, 1.84)

Marital status

 Single

111 (10.39%)

Ref

 Married or other

957 (89.61%)

1.30 (0.88, 1.93)

BMI

 < 18.5 kg/m²

23 (2.15%)

Ref

 18.5–24.0

561 (52.53%)

3.12 (0.92, 10.65)

 ≥ 24.0

484 (45.32%)

17.78 (5.20, 60.82)

Income

 < 2000 yuan/month

67 (6.27%)

Ref

 2000–3000

331 (30.99%)

0.99 (0.58, 1.67)

 ≥ 3000

670 (62.73%)

1.16 (0.70, 1.92)

Smoking status

 Never smoker

750 (70.22%)

Ref

 Smoker

318 (29.78%)

1.15 (0.89, 1.50)

Tea-drinking status

 No drinking

433 (40.54%)

Ref

 Drinking

635 (59.46%)

1.31 (1.03, 1.68)

Occupation

 Mental labour

310 (29.03%)

Ref

 Physical labour

247 (23.13%)

0.79 (0.56, 1.10)

 Other

511 (47.85%)

1.04 (0.78, 1.37)

Physical exercise

 Light

350 (32.77%)

Ref

 Moderate

311 (29.12%)

0.72 (0.53, 0.98)

 Severe

407 (38.11%)

0.73 (0.54, 0.97)

History of hyperlipidemia

 No

1019 (95.41%)

Ref

 Yes

49 (4.59%)

0.88 (0.50, 1.56)

History of diabetes

 No

1031 (96.54%)

Ref

 Yes

37 (3.46%)

1.49 (0.76, 2.90)

History of hypertension

 No

811 (75.94%)

Ref

 Yes

257 (24.06%)

1.89 (1.42, 2.51)

MUFA intake

32.64 ± 8.97

1.04 (1.02, 1.05)

Total PUFA intake

24.62 ± 4.90

1.13 (1.10, 1.17)

Nut intake

8.01 ± 12.97

1.00 (0.99, 1.01)

Energy intake

2215.79 ± 609.74

1.00 (1.00, 1.00)