Table 1. Characteristics of the 10 included studies.
| Study or subgroup | Year | Design | Language | SMILE group | FS-LASIK group | Follow-up (mo) | NOS | ||
|---|---|---|---|---|---|---|---|---|---|
| Eyes (n) | Preop mean SE (D) | Eyes (n) | Preop mean SE (D) | ||||||
| Bingjie Wang [2] | 2016 | CT | English | 50 | -7.60±1.12 (>-6.00) | 56 | -7.68±1.19 (>-6.00) | 12 mo | 6 |
| Bingjie Wang [3] | 2015 | CT (prospective) | English | 47 | −7.46±1.11 (≥−6.00) | 43 | −7.44±1.13 (≥−6.00) | 12 mo | 7 |
| Yishan Qian [6] | 2020 | CT (prospective) | English | 51 | Sum of the spherical and cylindrical refractive error (-10.00 ~14.00) | 45 | Sum of the spherical and cylindrical refractive error (-10.00 ~14.00) | 6 mo | 7 |
| Tian Han [7] | 2020 | CT | English | 75 | -8.79±1.83 (-6.00 ~12.25) | 46 | -9.17±2.03 (-6.25 ~12.25) | 24 mo | 6 |
| Likun Xia [17] | 2018 | CT (prospective) | English | 78 | -8.11±1.09 (-6.00~-12.00) | 65 | -8.05±1.12 (-6.00~-12.00) | 36 mo | 7 |
| Tian Han [18] | 2018 | CT | English | 60 | -6.54±1.69 (≥−6.00) | 41 | -7.15±1.92 (≥−6.00) | 36 mo | 7 |
| Congrong Jing [19] | 2018 | CT (prospective) | Chinese | 134 | -6.00~-10.00 | 106 | -6.00~-10.00 | 3 mo | 8 |
| Guofu Chen [20] | 2017 | RCT | Chinese | 64 | -9.59±0.57 (>-9.00) | 64 | -9.77±0.56 (>-9.00) | 6 mo | 6 |
| Xiaojing Li [21] | 2015 | CT | English | 55 | Spherical: -6.00±1.39 | 51 | Spherical: -6.18±1.61 | 6 mo | 6 |
| Cylindrical: -0.66±0.70 | Cylindrical: -0.83±0.66 | ||||||||
| (≥−6.00) | (≥−6.00) | ||||||||
| Yueming Zhou [22] | 2016 | CT | Chinese | 66 | -7.58±2.14 (-6.125 ~ -9.75) | 66 | -7.62±1.83 (-6.00~-9.875) | 6 mo | 6 |
| Xueyi Zhou [23] | 2019 | CT | English | 39 | −10.79±0.81 (–10.00~−13.00) | 34 | −11.06±0.99 (−10.00~−14.50) | 24 mo | 6 |
| Iben Bach Pedersen [24] | 2014 | CT | English | 29 | −6.00~−10.5 | 35 | −6.00 to −10.5 | 12 mo | 6 |
*CT: nonrandomized comparative trial; CT (prospective): prospective, nonrandomized comparative trial; RCT: randomized controlled trial
*Preop mean SE (D): preoperative mean refractive spherical equivalent in diopters; the value in parentheses indicates the range of spherical equivalent values.