DerSimonian and Laird results | Calculations for Hartung-Knapp- Sidik-Jonkman | |||
---|---|---|---|---|
Study | Study results SMD y_{i} | Weights w_{i} | (y _{ i } –y) ^{2} | w _{ i }× (y _{ i } –y) ^{2} |
Kurugol 2006a | −0.04 | 24.0 | 0.1225 | 2.94 |
Kurugol 2007 | −0.07 | 22.2 | 0.1024 | 2.27 |
Petrus 1998 | −0.31 | 21.3 | 0.0064 | 0.14 |
Prasad 2000 | −1.36 | 15.5 | 0.9409 | 14.58 |
Prasad 2008 | −0.54 | 17.0 | 0.0225 | 0.38 |
y = −0.39 | Sum: 100.0 | Sum: 20.31 | ||
5 studies, I^{2} = 75.0%, τ^{2} = 0.13 | ||||
DL pooled result [95% CI]: SMD = −0.39 [−0.77, –0.02]; z = 2.05; P–value = 0.04 | ||||
HKSJ pooled result [95% CI]: SMD = −0.39 [−1.02, 0.24]; t = 1.73; P–value = 0.16 (df = 4) |