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Table 1 Basic characteristics of included studies

From: Anterior cervical discectomy and fusion versus posterior cervical foraminotomy for the treatment of single-level unilateral cervical radiculopathy: a meta-analysis

StudiesStudy typeCountryGroupSample sizeMean age (years)Gender (Male)Follow up (month)
Alvin et al. [20]RetrospectiveUSAACDF4549.3 ± 9.628 (62.2%)12
open PCF2546.5 ± 11.215 (60.0%)12
Cho et al. [9]RetrospectiveKoreaACDF3049.7 ± 10.417 (56.7%)61.2 ± 20.2
open PCF3152.4 ± 9.622 (71.0%)62.6 ± 19.9
Dunn et al. [26]RetrospectiveUSAACDF21046.6 ± 6.695 (45.2%)44.9 ± 10.3
MI-PCF4946.9 ± 10.338 (77.6%)42.9 ± 6.6
Forster et al. [18]RetrospectiveUKACDF63449 ± 12313 (49.4%)24
open PCF5450 ± 1117 (31.5%)24
Herkowitz et al. [25]RCTUSAACDF1743 (26–52)NA60.4 (19.2–98.4)
open PCF1639 (21–50)NA
Korinth et al. [23]RetrospectiveGermanyACDF12445.9 ± 8.273 (58.9%)72.1 ± 25.9
open PCF16846.9 ± 10.498 (58.3%)
Lin et al. [10]RetrospectiveKoreaACDF5552.5 ± 10.731 (56.4%)39.5 ± 13.5
MI-PCF2153.1 ± 11.914 (66.7%)35.9 ± 16.6
Mansfield et al. [27]RetrospectiveUSAACDF7949 (24–75)35 (46.1%)NA
MI-PCF2249 (31–69)12 (57.1%)NA
Mok et al. [17]RetrospectiveUSAACDF81651.2 ± 11400 (49.0%)NA
open PCF14553.8 ± 9.382 (58.2%)NA
Ruetten et al. [28]RCTGermanyACDF86NANA24
MI-PCF89NANA24
Scholz et al. [19]RetrospectiveGermanyACDF4050 ± 10.120 (50.0%)33 ± 18.4
open PCF6751 ± 10.738 (56.7%)47 ± 16.4
Selvanathan 2015 [21]RetrospectiveUKACDF1504861 (40.7%)24 ± 1.4
open PCF515034 (66.7%)25 ± 1.2
Tumialan et al. [22]RetrospectiveUSAACDF1939.3 (24–52)19 (100%)18.1 (6–34)
open PCF1941.4 (27–56)17 (89.5%)11.2 (5–24)
Wirth et al. [24]RCTUSAACDF2541.714 (56.0%)2
open PCF2243.89 (40.9%)2
Witiw et al. [16]RetrospectiveUSAACDF4614748.5 ± 9.621141 (45.8%)1
open PCF485149.7 ± 9.72821 (58.2%)1
  1. RCT randomized controlled trial, ACDF anterior cervical discectomy and fusion, PCF posterior cervical foraminotomy, MI minimally invasive, NA not available