Table 1.
Characteristics of the included studies.
| Authors/yr of publication | Country | Female (%) | Age, yr (mean ± SD or range) | Study design | Number of patients | Mean follow-up time (yr) | Mean tumor diameter (cm) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| TT | LT | TT | LT | TT | LT | TT | LT | ||||
| Hay/2008 | USA | 627 (69.7) | 46 | Cohort | 765 | 125 | 17.2 | 0.7 | |||
| Lee/2013 | Korea | 908 (89.7) | 45.3 | Cohort | 506 | 506 | 11.8 | 0.61 | 0.59 | ||
| Donatini/2016 | France | 717 (81.4) | 48.5 (19–90) | 44.2 (11–80) | Cohort | 251 | 69 | 10.8 | 11.2 | 0.78 | 0.71 |
| Dobrinja/2017 | Italy | 80 (76.2) | 54 (12–77) | 56 (30–79) | Cohort | 86 | 19 | 4.8 | 5.3 | 0.53 | 0.6 |
| Kim/2017 | Korea | 7057 (81.3) | 48.3 ± 10.4 | 45.5 ± 10.5 | Cohort | 5387 | 3289 | 5.4 | 0.6 ± 0.2 | 0.5 ± 0.2 | |
| Kwon/2017 | Korea | 1256 (91.3) | 47 (41–54) | Cohort | 688 | 688 | 8.5 | 0.6 | 0.6 | ||
| Xu/2018 | China | 2739 (75.9) | 47.5 ± 12.0 | Cohort | 1868 | 1706 | 5.7 | 0.6 ± 0.3 | |||
| Jeon/2019 | Korea | 226 (88.6) | 47.65 ± 10.39 | 47.65 ± 10.39 | Cohort | 128 | 127 | 8 | 7.9 | 0.67 ± 0.2 | 0.63 ± 0.2 |
LT = lobectomy, TT = total thyroidectomy.