Table 5 Univariable and Multivariable logistic regression analysis of risk factors for astigmatism ≥ 3.0 D (N = 1267)

Age (year)

< 0.001

0.297

7

99 (1.5)

Reference

Reference

8

113 (1.5)

1.013 (0.772–1.329)

0.927

1.215 (0.922–1.602)

0.167

9

122 (1.6)

1.087 (0.832–1.419)

0.543

1.283 (0.976–1.686)

0.074

10

112 (1.5)

1.001 (0.762–1.314)

0.997

1.105 (0.835–1.463)

0.483

11

126 (1.5)

1.029 (0.789–1.341)

0.833

1.055 (0.800-1.392)

0.702

12

143 (1.8)

1.260 (0.973–1.631)

0.08

1.241 (0.945–1.630)

0.121

13

95 (1.6)

1.089 (0.820–1.446)

0.556

1.023 (0.758–1.381)

0.883

14

119 (2.2)

1.511 (1.155–1.977)

0.003

1.254 (0.938–1.675)

0.126

15

113 (2.5)

1.705 (1.298–2.239)

< 0.001

1.348 (1.004–1.809)

0.047

16

85 (2.5)

1.755 (1.309–2.352)

< 0.001

1.495 (1.091–2.048)

0.012

17

78 (2.3)

1.609 (1.192–2.171)

0.002

1.300 (0.941–1.796)

0.112

18

48 (1.9)

1.335 (0.943–1.891)

0.103

1.237 (0.856–1.788)

0.257

19

14 (1.6)

1.090 (0.620–1.917)

0.764

1.092 (0.608–1.960)

0.768

Gender

Female

571 (1.6)

Reference

Reference

Male

696 (1.9)

1.176 (1.052–1.315)

0.004

1.198 (1.069–1.342)

0.002

Nationality

< 0.001

0.002

Han

878 (2.0)

1.868 (1.558–2.240)

< 0.001

1.392 (1.146–1.692)

0.001

Uyghur

136 (1.1)

Reference

Reference

Kazakhs

26 (1.7)

1.643 (1.077–2.508)

0.021

1.621 (1.056–2.488)

0.027

Hui

95 (1.8)

1.750 (1.347–2.273)

< 0.001

1.400 (1.068–1.834)

0.015

Kyrgyz

98 (1.8)

1.702 (1.307–2.216)

< 0.001

1.632 (1.249–2.133)

< 0.001

Others

24 (1.2)

1.137 (0.735–1.759)

0.565

0.952 (0.612–1.481)

0.827

Spherical equivalent (right eye)

< 0.001

< 0.001

SE≤-6.00 D

158 (15.6)

23.685 (19.273–29.108)

< 0.001

21.427 (17.048–26.930)

< 0.001

-6.00 D<SE≤-3.00 D

226 (2.8)

3.736 (3.131–4.457)

< 0.001

3.439 (2.824–4.187)

< 0.001

-3.00 D<SE<-0.50 D

391 (1.7)

2.158 (1.850–2.517)

< 0.001

2.063 (1.754–2.426)

< 0.001

-0.50 D ≤ SE ≤ + 0.50 D

283 (0.8)

Reference

Reference

SE > + 0.50 D

209 (7.2)

9.872 (8.221–11.854)

< 0.001

10.128 (8.411–12.195)

< 0.001