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Table 6 Multivariate analyses for the factors associated with vision impairment (N = 4804)

From: Prevalence of myopia and vision impairment in school students in Eastern China

Demographics

Odds ratio (95% CI)

P-value

Grade

 

< 0.0001

 Kindergarten

Reference

 

 Grade 1

1.89 (0.94, 3.83)

 

 Grade 2

7.01 (3.81, 12.9)

 

 Grade 3

9.60 (5.26, 17.5)

 

 Grade 4

19.4 (10.8, 35.1)

 

 Grade 5

33.6 (18.6, 60.7)

 

 Grade 6

48.4 (26.7, 87.9)

 

 Grade 7

76.4 (42.0, 139)

 

 Grade 8

88.1 (48.2, 161)

 

 Grade 9

137 (73.9, 255)

 

 Grade 10

199 (104, 379)

 

 Grade 11

211 (110, 403)

 

 Grade 12

187 (99, 351)

 

Gender

 

< 0.0001

 Male

Reference

 

 Female

1.36 (1.18, 1.57)

 

School location

 

0.28

 Urban

0.92 (0.78, 1.08)

 

 Rural

Reference

 

School workload

 

< 0.0001

 Low

Reference

 

 Moderate

1.54 (1.06, 2.24)

 

 High

2.29 (1.54, 3.41)

 
  1. Note: AUC = 0.842 from all these risk factors for predicting vision impairment, which is slightly higher than the AUC (0.840) from the multivariate using age instead of grade