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Table 2 Characteristics of the Han and Mongolian participants

From: Prevalence and associated factors for pterygium in Han and Mongolian adults: a cross-sectional study in inner Mongolian, China

 

Han

Mongolian

P value

 

N = 1910

N = 741

  

Age, y

49.06 ± 11.15

48.59 ± 10.84

0.324

 

Sex, n%

  

0.967

 

 Male

751(39.3)

292(39.4)

  

 Female

1159(60.7)

499(60.6)

  

Height, cm

162.51 ± 8.08

162.80 ± 8.32

0.396

 

Weight, kg

65.84 ± 12.02

67.97 ± 12.90

<0.001

***

BMI level

  

<0.001

***

 <24

815(43.2%)

243(33.2%)

  

 24–27.9

725(38.5%)

306(41.9%)

  

  ≥ 28

345(18.3%)

182(24.9%)

  

Body fat percentage, n%

29.58 ± 7.70

30.99 ± 7.78

<0.001

***

Serum total cholesterol, mmol/L

  < 2.26

1(0.1%)

1(0.1%)

0.487

 

  ≥ 2.26

1907(99.9%)

739(99.9%)

  

Triglycerides, mmol/L

  < 6.22

1450(76.0%)

583(78.8)

0.127

 

  ≥ 6.22

458(24.0%)

157(21.2%)

  

Low-density lipoprotein cholesterol, mmol/L

  

0.009

**

  < 4.14

383(20.1%)

116(15.7%)

  

  ≥ 4.14

1525(79.9%)

624(84.3%)

  

High-density lipoprotein cholesterol, mmol/L

  

0.228

 

  ≤ 1.04

18(0.9%)

11(1.5%)

  

  > 1.04

1890(99.1%)

729(98.5%)

  

Birthplace, n%

  

<0.001

***

 Urban

853(44.7)

182(24.6)

  

 Rural

1057(55.3)

559(75.4)

  

Residence, n%

  

<0.001

***

 Urban

1772(92.8)

651(87.9)

  

 Rural

138(7.2)

90(12.1)

  

Education, n%

  

<0.001

***

 Elementary or lower

304(15.9)

93(12.6)

  

 Middle and high school

1106(57.9)

296(39.9)

  

 University or higher

500(26.2)

352(47.5)

  

Occupation, n%

  

<0.001

***

 Indoor

1767(92.5)

652(88.0)

  

 Outdoor

143(7.5)

89(12.0)

  

Exercise level, n%

  

0.464

 

 Light

377(19.7)

112(15.1)

  

 Moderate

278(14.6)

67(9.0)

  

 Heavy

21(1.1)

5(0.7)

  

Hypertension, n%

597(31.3)

268(36.2)

0.024

*

Systolic pressure, n%

352(18.4)

149(20.1)

0.322

 

Diastolic pressure, n%

305(16.0)

151(20.4)

0.007

**

Diabetes, n%

98(5.1)

37(5.0)

0.136

 

Alcohol, n%

  

<0.001

***

 Never

1154(60.4)

369(49.8)

  

 Ever

756(39.6)

372(50.2)

  

Smoking status, n%

  

0.8

 

 Never

1310(68.6)

512(69.1)

  

 Ever

600(31.4)

229(30.9)

  

Survey sites

  

<0.001

***

 Wuyuan

593(31.0)

199(26.9)

  

 Hohhot

393(20.6)

89(12.0)

  

 Tsining District

680(35.6)

31(4.2)

  

 Xilingol League

244(12.8)

422(57.0)

  

Time in rural, d

4452.76 ± 5643.96

5954.18 ± 5974.69

<0.001

***

  1. *P < 0.05, **P < 0.01, ***P < 0.001