Table 2 Subgroup analyses of all-cause and cardiovascular mortality
Subgroups | Number of studies | Number of patients | Pooled HR | 95% CI | Heterogeneity among studies |
|---|---|---|---|---|---|
All-causemortality | |||||
Region | |||||
Asia | 5 | 2006 | 1.76 | 1.38–2.25 | P = 0.450;I2 = 0.0% |
Non-Asian region | 2 | 339 | 1.71 | 0.84–3.49 | P = 0.040;I2 = 76.3% |
Dialysis modality | |||||
Hemodialysis | 5 | 2041 | 1.62 | 1.30–2.00 | P = 0.301;I2 = 17.8% |
Peritoneal dialysis | 2 | 304 | 2.68 | 1.57–4.58 | P = 0.703;I2 = 0.0% |
Follow-up duration | |||||
≥ 2 years | 6 | 2153 | 1.67 | 1.35–2.05 | P = 0.255;I2 = 23.8% |
< 2 years | 1 | 192 | 2.50 | 1.32–4.76 | – |
Echocardiography | |||||
1 physician | 4 | 743 | 2.320 | 1.714–3.140 | P = 0.778;I2 = 0.0% |
2 physicians | 3 | 1602 | 1.386 | 1.064–1.805 | P = 0.762;I2 = 0.0% |
Number of CVC | |||||
1 | 3 | 1535 | 1.35 | 1.02–1.79 | P = 0.738;I2 = 0.0% |
2 | 2 | 1434 | 2.15 | 1.57–2.94 | P = 0.960;I2 = 0.0% |
Cardiovascular mortality | |||||
Region | |||||
Asia | 5 | 1990 | 3.26 | 2.43–4.36 | P = 0.492;I2 = 0.0% |
Non-Asian region | 1 | 202 | 1.48 | 0.86–2.54 | – |
Dialysis modality | |||||
Hemodialysis | 5 | 2000 | 2.57 | 1.96–3.36 | P = 0.117;I2 = 45.8% |
Peritoneal dialysis | 1 | 192 | 5.39 | 2.16–3.48 | – |
Follow-up duration | |||||
≥ 2 years | 4 | 1904 | 2.17 | 1.56–3.03 | P = 0.202;I2 = 35.0% |
< 2 years | 2 | 288 | 3.81 | 2.54–5.72 | P = 0.407;I2 = 0.0% |
Echocardiography | |||||
1 physician | 3 | 590 | 3.718 | 2.624–5.268 | P = 0.691;I2 = 0.0% |
2 physicians | 3 | 1602 | 1.890 | 1.256–2.845 | P = 0.333;I2 = 9.0% |
Number of CVC | |||||
1 | 1 | 1290 | 1.68 | 1.01–2.83 | – |
2 | 1 | 1290 | 2.80 | 1.63–4.81 | – |