Table 3 Random-effects model for study subjects representing speckle-tracking echocardiographic parameters in patients with chronic obstructive pulmonary disease
Group | No. of studies | Effect size | 95% CI | Test of null (two-tailed) | Prediction interval | Between study | Other heterogeneity statistic | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Standard error | Variance | Z-value | P-value | Ï„ | Ï„2 | Q-value | df (Q) | P-value | I2 (%) | ||||
Fixed effects analysis | Â | Â | Â | Â | Â | Â | Â | Â | Â | 77.747 | 4 | 0.000 | 94.855 |
 LV | 5 | - | 0.022 | –17,615 to –17.035 | –117.202 |  < 0.001 | - | - | - | 39.132 | 5 | 0.000 | 87.223 |
 RV | 6 | - | - | –19.623 to –19.052 | –132.793 |  < 0.001 | - | - | - | 116.879 | 9 | 0.000 | - |
Total within | - | - | 0.021 | - | - | - | - | - | - | 94.028 | 1 | 0.000 | - |
Total between | - | - | - | - | - | - | - | - | - | 210.907 | 10 | 0.000 | 95.259 |
Overall | 11 | - | 0.011 | –18.550 to –18.143 | –176.851 |  < 0.001 | - | - | - | - | - | - | - |
Random-effects analysis | |||||||||||||
 LV | 5 | 0.684 | 0.467 | –18.395 to –15.715 | –24.950 |  < 0.001 | –22.237 to –11.872 | 1.478 | 2.185 | - | - | - | - |
 RV | 6 | 0.493 | 0.243 | –20.064 to –18.131 | –38.722 |  < 0.001 | –22.416 to –15.779 | 1.089 | 1.185 | - | - | - | - |
Total between | - | - | - | - | - | - | - | - | - | 5.873 | 1 | 0.015 | Â |
 Overall | 11 | 0.400 | 0.160 | –19.182 to –17.614 | –46.000 |  < 0.001 | –22.147 to –14.650 | 1.608 | 2.586 | - | - | - | - |