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Table 3 Characteristics of 2006 visually impaired participants wearing and not wearing glasses

From: Prevalence and causes of visual impairment and rate of wearing spectacles in schools for children of migrant workers in Shanghai, China

   Wearing glasses Not wearing glasses P value OR (95% CI)
N (%) N (%)
Sex Male 167 (53.7) 949 (55.99)   1
Female 144 (46.30) 746 (44.01) 0.4959 1.10 (0.86,1.40)
Grade 1 27 (8.68) 211 (12.45)   1
2 32 (10.29) 273 (16.11) 0.7514 0.92 (0.53,1.58)
3 51 (16.40) 342 (20.18) 0.5462 1.17 (0.71,1.92)
4 82 (26.37) 417 (24.60) 0.0703 1.54 (0.97,2.45)
5 119 (38.26) 452 (26.67) 0.0016 2.06 (1.31,3.22)
Age (y) 7–8 37 (11.90) 316 (18.64)   1
9–10 108 (34.73) 588 (34.69) 0.0265 1.57 (1.05,2.34)
11–12 166 (53.38) 791 (46.67) 0.0026 1.79 (1.23,2.62)
All   311 (100.00) 1695 (100.00)