Table 6

A Comparison of Folllow-up time between Pre-ETROP and Post-ETROP Groups.

Group

N

Mean

Std Dev

Std Error

Median

Minimum

Maximum

Pre-ETROP

28

491.75

599.47

113.29

304

1

2450

Post-ETROP

52

253.37

266.28

36.93

164

14

1135

Wilcoxon Two-Sample Test p-value: 0.09.

A Comparison of Follow-up time between Pre-ETROP and Post-ETROP groups. There is no statistical evidence of difference in the median of follow-up time between the two groups. While the Post-ETROP group showed shorter follow-up time than the Pre-ETROP Group, this was not statistically significant at the 0.05 level.

Alme et al. BMC Ophthalmology 2008 8:23   doi:10.1186/1471-2415-8-23