Table 1.
Baseline characteristics of published studies included in the meta‐analysis
| Study | Publication year | Country | Study design | Sample size (N) | Male / Female (N) | Spontaneous type 1 ECG, N (%) | Induced type 1 ECG, N (%) | Cascade testing, N (%) | Age (mean ± SD) | SCN5A mutation, N (%) | Documented VF, N (%) | Syncope, N (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eckardt, et al17 | 2005 | Germany, France, Netherlands | Prospective cohort | 183 | 140/43 | 125 (59) | 87 (41) | 47 (22) | 45 ± 6 | 57 (31.1) | Not reported | 65 (35.5) |
| Juang, et al15 | 2003 | Taiwan | Prospective cohort | 4 | 4/0 | Not reported | 4 (100) | Not reported | 45.2 ± 2.06 | 1 (25) | 3 (75) | 3 (75) |
| Nishii, et al10 | 2010 | Japan | Prospective cohort | 108 | 105/3 | 71 (65.7) | 37 (34.3) | Not reported | 46.8 ± 11.6 | 17 (15.7) | 23 (21.3) | 43 (39.8) |
| Amin, et al18 | 2011 | Netherlands | Retrospective cohort | 214 | 133/81 | 49 (22.9) | 165 (77.1) | Not reported | 46.9 ± 2.2 | 78 (36.4) | Not reported | 67 (31.3) |
| Yokokawa, et al16 | 2007 | Japan | Prospective cohort | 44 | 44/0 | 31 (70) | 13 (30) | Not reported | 46.0 ± 12.0 | 8 (18.2) | 19 (43.2) | 0 (0) |
ECG, electrocardiogram; VF, ventricular fibrillation.