Table 1 Characteristics of the 14 studies included in this meta-analysis
References | Design | Number of patients | Surgical level | Average follow-up (mos) | Mean ages (years) | Quality assessment (NOQAS) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ZP | CP | ZP | CP | ZP | CP | Selection | Comparability | Exposure | Total score | |||
Chen et al. [2] | P | 37 | 32 | 2 | 40.6 ± 9.2 | 43.5 ± 10.4 | 48.9 ± 4.0 | 49.5 ± 4.2 | 3 | 2 | 3 | 8 |
Chen et al. [3] | P | 34 | 38 | 3 | 36 | 36 | 56.2 ± 5.7 | 56.9 ± 5.9 | 4 | 2 | 3 | 9 |
Chen et al. [4] | R | 33 | 38 | 3 | 30.0 ± 5 | 31.5 ± 4.5 | 49.3 ± 3.7 | 48.8 ± 3.9 | 3 | 2 | 3 | 8 |
He et al. [5] | P | 52 | 52 | 2,3,4 | 24 | 24 | 55.4 ± 12.4 | 59.5 ± 12.6 | 3 | 1 | 3 | 7 |
Lan et al. [6] | R | 35 | 33 | 1 | 23.68 ± 1.93 | 24.39 ± 2.00 | 54.05 ± 10.11 | 52.09 ± 10.46 | 4 | 1 | 3 | 8 |
Li et al. [14] | R | 61 | 55 | 1 | 24 | 24 | 58.8 ± 4.6 | 58.5 ± 4.9 | 4 | 2 | 3 | 9 |
Liu et al. [15] | R | 28 | 32 | 3,4 | 23.3 ± 6.9 | 24.2 ± 6.4 | 56.6 ± 9.7 | 57.5 ± 9.5 | 3 | 2 | 3 | 8 |
Lu et al. [10] | R | 22 | 24 | 2 | 30.5 ± 5.2 | 32.1 ± 6.5 | 56.6 ± 6.4 | 58.6 ± 7.2 | 3 | 2 | 3 | 8 |
Qi et al. [11] | R | 83 | 107 | 1,2,3 | 17.9 ± 4.2 | 19.0 ± 4.2 | 42.3 | 42.5 | 3 | 1 | 3 | 7 |
Shi et al. [12] | R | 34 | 31 | 2 | 24 | 24 | 56.1 ± 4.5 | 55.8 ± 4.9 | 4 | 2 | 3 | 9 |
Shi et al. [13] | R | 27 | 34 | 3 | 60 | 60 | 54.7 ± 7.6 | 56.4 ± 7.5 | 3 | 2 | 3 | 8 |
Wang et al. [17] | R | 22 | 25 | 1 | 33.59 ± 5.52 | 33.16 ± 5.97 | 50.86 ± 8.79 | 53.68 ± 8.96 | 3 | 2 | 3 | 8 |
Wang et al. [16] | R | 27 | 30 | 1 | 35.2 | 35.5 | 51.6 ± 11.3 | 54.0 ± 8.5 | 3 | 1 | 3 | 7 |
Zhang et al. [18] | R | 74 | 116 | 1 | 34.07 ± 3.20 | 36.50 ± 6.28 | 50.14 ± 6.05 | 50.29 ± 9.06 | 3 | 2 | 3 | 8 |