TABLE 7.

Multiple Logistic Regression Odds of Vision Impairment and Blindness in 2014 as Compared to 2006

	Presenting Visual Acuity		Best-Corrected Visual Acuity
Site	<20/63 to 20/400	<20/400	<20/63 to 20/400	<20/400
Beijing	0.74 (0.58–0.95)*	0.58 (0.34–1.01)	0.67 (0.45–1.01)	0.48 (0.25–0.92)*
Jiangsu	1.30 (1.08–1.57)**	0.49 (0.32–0.75)**	1.49 (1.17–1.89)**	0.57 (0.37–0.87)*
Guangdong	0.66 (0.59–0.75)**	0.55 (0.39–0.77)**	0.40 (0.32–0.49)*	0.45 (0.32–0.64)**
Heilongjiang	1.03 (0.82–1.28)	0.70 (0.51–0.96)*	0.83 (0.65–1.05)	0.69 (0.49–0.97)*
Jiangxi	0.54 (0.48–0.60)**	0.51 (0.35–0.75)**	0.62 (0.52–0.74)**	0.55 (0.37–0.80)**
Hebei	0.90 (0.75–1.09)	0.41 (0.27–0.61)**	0.68 (0.52–0.90)**	0.44 (0.27–0.71)**
Chongqing	0.74 (0.57–0.96)*	0.44 (0.31–0.64)**	0.60 (0.46–0.78)**	0.39 (0.26–0.59)**
Yunnan	0.81 (0.67–0.98)*	0.80 (0.54–1.18)	0.77 (0.62–0.96)*	0.81 (0.55–1.19)
All study sites	0.79 (0.73–0.87)**	0.59 (0.51–0.69)**	0.69 (0.63–0.77)**	0.59 (0.50–0.70)**

Data are given as the survey year odds ratio (95% confidence interval) in modeling vision impairment (<20/63 to 20/400) and blindness (<20/400) using combined 2006 and 2014 data with sex, age, and survey year as covariates. Statistical significance at the P ≤ .05 level is indicated by 1 asterisk (*) and significance at the P ≤ .01 level by 2 asterisks (**).