Prevalence of reduced visual acuity among adolescents in Jiaocheng County, Shanxi Province

BMC Ophthalmology

Table 3 Logistic regression models predicting reduced UCDVA among students

Variable	7–9 years old	10–12 years old	13–15 years old	16–18 years old	19–21 years old
Gender	0.70 (0.57–0.87)	0.67 (0.59–0.76)	0.51 (0.43–0.60)	0.48 (0.36–0.64)	0.39 (0.24–0.65)
County/Suburb	1.70 (1.37–2.10)	1.23 (1.07–1.41)	1.53 (1.29–1.80)	1.41 (1.07–1.84)	2.05 (1.29–3.28)
Feeling learning pressure	1.24 (1.00–1.54)	1.58 (1.39–1.78)	1.43 (1.22–1.69)	1.36 (1.03–1.78)	0.56 (0.34–0.93)
Time of homework every day≥2 h	1.40 (1.14–1.73)	1.58 (1.40–1.80)	1.31 (1.10–1.54)	1.52 (1.16–1.99)	1.81 (1.14–2.89)
Outdoor time every day≥2 h	0.54 (0.43–0.66)	0.70 (0.62–0.79)	0.77 (0.64–0.90)	0.61 (0.46–0.80)	0.43 (0.27–0.68)
Sleep time every day	0.78 (0.62–0.95)	0.75 (0.66–0.85)	0.83 (0.70–0.97)	0.73 (0.56–0.96)	0.58 (0.36–0.95)

Gender:0 = girls，1 = boys； County/Suburb:0 = Suburb，1 = County； Feeling learning pressure:0 = Feeling not learning pressure，1 = Feeling learning pressure； Time of homework every day:0 = less than 2 h;1 = more than 2 h; Outdoor time every day: 0 = less than 2 h;1 = more than 2 h; Sleep time every day: 0 = not enough sleep, 1 = enough sleep (7-9 years ≥ 10 h, 10-12 years ≥ 9 h，13-21 years ≥ 8 h)

ISSN: 1471-2415