Figure 1.
Flow diagram of the literature selection process.
Table 1.
Basic information of the included studies
| Reference | Country | Institution | Design | Sample size | Gender (male/female) | Mean age (years) | Follow-up period (months) | Conducted period | Follow-up time point (d/months) | Complications (N) |
|---|---|---|---|---|---|---|---|---|---|---|
| Chen et al., [36] | Taiwan, China | The Kaohsiung Chang Gung Memorial Hospital Medical Center in Taiwan | Retrospective study | 9 | 6/3 | 51.80 ± 16.00 | 12 | 2019.04–2020.12 |
|
|
| Ren et al., [37] | China | Zhejiang Provincial People's Hospital | Retrospective study | 47 | 29/18 | 51 ± 12 | 28.6 (21.3–36.6) | 2014.06–2020.12 |
|
|
| Zhang et al., [38] | China | Fujian Provincial Hospital | Retrospective study | 30 | 16/14 | 45.8 ± 13.3 | 6 | 2018.01–2021.02 |
|
|
| Qin et al., [39] | China | Nanchong Central Hospital | Retrospective study | 32 | 13/19 | 53.53 ± 13.64 | 12 | 2018.11–2019.05 |
|
|
Table 2.
Quality assessment of cohort studies
| Reference | Is the case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Comparability of cases and controls on the basis of the design or analysis | Ascertainment of exposure | Same method of ascertainment for cases and controls | Nonresponse rate | Total scores |
|---|---|---|---|---|---|---|---|---|---|
| Chen et al., [36] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 8 |
| Ren et al., [37] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ☆ | 7 |
| Zhang et al., [38] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ☆ | 7 |
| Qin et al., [39] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 8 |
Figure 2.
Meta-analysis and forest plot of post-RFA and pre-RFA of PTH levels. (A) 1 d, (B) 6 months, and (C) 12 months. PTH, parathyroid hormone; RFA, radiofrequency ablation.
Figure 3.
Meta-analysis and forest plot of post-RFA and pre-RFA of serum calcium levels. (A) 1 d and (B) 6 months. RFA, radiofrequency ablation.
Figure 4.
The meta-analysis, funnel plot, and forest plot of post-RFA and pre-RFA of serum phosphorus levels. (A) 1 d and (B) 6 months. RFA, radiofrequency ablation.