Table1

Skewness of patient delay time data in studies that reported means and SD

StudyMeanSDSD ×2Likely skewness
Before and after studies
 Addo et al 66 B3745121024Skewed
A296.8356.3712.6
 Diercks et al 56 B232271.3542.6Skewed
A224257.9515.8
 Naegeli et al 63 B247248.4496.8Skewed
A223.3229.8459.6
 Wolters et al 51 B81041768352Skewed
A31811462292
Controlled studies
 Dracup et al 15 I257.420.4040.8Not skewed
C304.841.482.8
 Luepker et al 31 I130.28.2516.5Not skewed
C304.841.4082.8
 Sun et al 37 I498348696Skewed
C630390780
  • B-before A-after i-Intervention c- control