Table 1. Characteristics of the included NMA.
| Category | Frequency | Proportion [%(95% CI)] | |
|---|---|---|---|
| Language (n = 102) | English | 92 | 90.20 (82.70–94.60) |
| Chinese | 10 | 9.80 (5.40–17.30) | |
| Journal quality (n = 102) | SCI | 87 | 85.30 (77.00–90.90) |
| Non-SCI | 15 | 14.70 (9.10–23.00) | |
| CSCD | 3 | 2.90 (1.00–8.70) | |
| Non-CSCD | 7 | 6.90 (3.30–13.70) | |
| Impact factor (n = 87) | Median (IQR) | 3.94 (2.721–5.635) | |
| 0.0–2.0 | 6 | 6.90 (3.10–14.50) | |
| 2.0–5.0 | 49 | 56.30 (45.80–66.30) | |
| 5.0–10.0 | 22 | 25.30 (17.30–35.40) | |
| ≥10.0 | 10 | 11.50 (6.30–20.10) | |
| Publishing period (n = 56) | Median (IQR) | 101 (47–187) day | |
| 1–30 days | 12 | 21.40 (12.60–34.10) | |
| 30–60 days | 10 | 17.90 (9.90–30.10) | |
| 60–90 days | 4 | 7.10 (2.70–17.50) | |
| 90–150 days | 12 | 21.40 (12.60–34.10) | |
| ≥150 days | 19 | 33.90 (22.80–47.20) | |
| Funding source (n = 60) | Unfunded (n = 14) | 14 | 23.30 (14.30–35.60) |
| Industry-supported (n = 20) | 20 | 33.30 (22.60–46.10) | |
| Government-supported (n = 23) | 23 | 38.30 (27.00–51.10) | |
| Industry + Government (n = 3) | 3 | 5.00 (1.60–14.40) | |
| Number of author | Median (IQR) | 6 (5–8) | |
| Type of included study (n = 102) | RCT | 100 | 98.00 (92.50–99.50) |
| Meta-analysis | 2 | 2.00 (0.50–7.50) | |
| Number of included trial | Median (IQR) | 12 (7–23) | |
| Intervention | Median (IQR) | 5 (3–9) | |
| Sample size (n = 102) | Median (IQR) | 3605 (1950–7564) | |
| Not reported | 7 | 6.90 (3.30–13.70) | |
| Outcome (n = 102) | Median (IQR) | 3 (2–5) | |
| Dichotomous | 73 | 71.60 (62.10–79.50) | |
| Continue | 5 | 4.90 (2.10–11.20) | |
| Survival time | 79 | 77.50 (68.30–84.50) | |
| Number of study arm (n = 102) | Two arms | 50 | 49.00 (39.50–58.60) |
| Three arms | 7 | 6.90 (3.30–13.70) | |
| Two + Three arms/more | 36 | 35.30 (26.70–45.00) |
Note: CI, confidence interval; NMA, network meta-analysis; SCI, Science Citation Index; CSCD, Chinese Science Citation Database; IQR, interquartile range.