Efficacy and Safety of Topical Timolol Eye Drops in the Treatment of Myopic Regression after Laser In Situ Keratomileusis: A Systematic Review and Meta-Analysis

Table 1

Demographic characteristics of eligible studies.

Study; (year)	Country	Population	Gender (male : female)		Mean age (Yr) ± SD
			Timolol	Control	Timolol	Control
Zhongwen 2014 [13]	China	60	NS	NS	24.47 ± 5.45	25.07 ± 6.23
Guan 2013 [14]	China	60	18 : 12	16 : 14	20.0 ± 7.50	22.0 ± 5.50
Shojaei et al. 2012 [15]	Iran	90	9 : 36	15 : 30	33.31 ± 10.90	34.42 ± 8.57
Zhang et al. 2011 [16]	China	60	NS	NS	25.37 ± 6.13	24.53 ± 2.31
Yang et al. 2010 [17]	China	53	NS	NS	NS	NS
EI-Awady et al. 2010 [18]	Egypt	75	NS	NS	NS	NS

SD: standard deviation; Yr: years; NS: data not available.