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Table 4 Sub-group analysis of item responses by subject

From: Risk of bias of randomized controlled trials published in orthopaedic journals

Randomization Y N DK
Adult reconstruction 33(71.7) 3(6.5) 10(21.7)
Pediatric Orthopaedic Surgery 5(71.4) 2(28.6) 0(0)
Sports Medicine 50(71.4) 6(8.6) 14(20.0)
Trauma 13(86.7) 1(6.7) 1(6.7)
Foot and Ankle 20(69.0) 2(6.9) 7(24.1)
Hand and Upper Extremity 11(84.6) 0(0) 2(15.4)
Spine 13(56.5) 0(0) 10(43.5)
OA 20(57.1) 3(8.6) 12(34.3)
Allocation Concealment
Adult reconstruction 33(71.7) 3(6.5) 10(21.7)
Pediatric Orthopaedic Surgery 5(71.4) 2(28.6) 0(0)
Sports Medicine 48(68.6) 5(7.1) 17(24.3)
Trauma 13(86.7) 1(6.7) 1(6.7)
Foot and Ankle 20(69.0) 2(6.9) 7(24.1)
Hand and Upper Extremity 11(84.6) 0(0) 2(15.4)
Spine 13(56.5) 0(0) 10(43.5)
OA 21(60.) 2(5.7) 12(34.3)
Blinding of Participants
Adult reconstruction 10(21.7) 9(19.6) 27(58.7)
Pediatric Orthopaedic Surgery 2(28.6) 4(57.1) 1(14.3)
Sports Medicine 10(14.3) 10(14.3) 50(71.4)
Trauma 3(20.0) 5(33.3) 7(46.7)
Foot and Ankle 5(17.2) 9(31.0) 15(51.7)
Hand and Upper Extremity 3(23.1) 2(15.4) 8(61.5)
Spine 5(21.7) 7(30.4) 11(47.8)
OA 11(31.4) 5(14.3) 19(54.3)
Blinding of Assessors
Adult reconstruction 20(43.5) 8(17.4) 18(39.1)
Pediatric Orthopaedic Surgery 3(42.9) 2(28.6) 2(28.6)
Sports Medicine 34(48.6) 10(14.3) 26(37.1)
Trauma 9(60.0) 3(20.0) 3(20.0)
Foot and Ankle 14(48.3) 6(20.7) 9(31.0)
Hand and Upper Extremity 6(46.2) 4(30.8) 3(23.1)
Spine 10(43.5) 3(13.0) 10(43.5)
OA 22(62.9) 1(2.9) 12(34.3)
Outcome Measurement
Adult reconstruction 44(95.7) 1(2.2) 1(2.2)
Pediatric Orthopaedic Surgery 7(100) 0 (0) 0 (0)
Sports Medicine 63(90.0) 1(1.4) 6(8.6)
Trauma 14(93.3) 0(0) 1(6.7)
Foot and Ankle 28(96.6) 0(0) 1(3.5)
Hand and Upper Extremity 13(100) 0(0) 0(0)
Spine 21(91.3) 0(0) 2(8.7)
OA 34(97.1) 0(0) 1(2.9)
Similarly Trained Individuals
Adult reconstruction 25(54.4) 0(0) 21(45.7)
Pediatric Orthopaedic Surgery 3(42.9) 0(0) 4(57.1)
Sports Medicine 54(77.1) 1(1.4) 15(21.4)
Trauma 6(40.0) 1(6.7) 8(53.3)
Foot and Ankle 17(58.6) 1(3.5) 11(37.9)
Hand and Upper Extremity 4(30.8) 0(0) 9(69.2)
Spine 4(17.4) 0(0) 19(82.6)
OA 0(0) 0(0) 35(100)
Compliance with Intervention
Adult reconstruction 32(69.6) 14(30.4) 0(0)
Pediatric Orthopaedic Surgery 5(71.4) 2(28.6) 0(0)
Sports Medicine 53(75.7) 17(24.3) 0(0)
Trauma 9(60.0) 6(40.0) 0(0)
Foot and Ankle 18(62.1) 10(34.5) 1(3.5)
Hand and Upper Extremity 8(61.5) 5(38.5) 0(0)
Spine 12(52.2) 11(47.8) 0(0)
OA 29(82.9) 6(17.1) 0(0)
Intent to Treat Analysis
Adult reconstruction 14(30.4) 1(2.2) 31(67.4)
Pediatric Orthopaedic Surgery 5(71.4) 0(0) 2(28.6)
Sports Medicine 26(37.1) 2(2.9) 42(60.0)
Trauma 6(40.0) 0(0) 9(60.0)
Foot and Ankle 15(51.7) 0(0) 14(48.3)
Hand and Upper Extremity 7(52.9) 0(0) 6(46.2)
Spine 8(34.8) 1(4.4) 14(60.9)
OA 22(62.9) 0(0) 13(37.1)
Clustering
Adult reconstruction 1(2.2) 0(0) 45(97.8)
Pediatric Orthopaedic Surgery 0(0) 0(0) 7(100)
Sports Medicine 0(0) 0(0) 70(100)
Trauma 0(0) 0(0) 15(100)
Foot and Ankle 0(0) 0(0) 29(100)
Hand and Upper Extremity 0(0) 0(0) 13(100)
Spine 0(0) 0(0) 23(100)
OA 0(0) 0(0) 35(100)
Similar at Baseline
Adult reconstruction 33(71.7) 4(8.7) 9(19.6)
Pediatric Orthopaedic Surgery 6(85.7) 1(14.3) 0(0)
Sports Medicine 54(77.1) 3(4.3) 13(18.6)
Trauma 9(60.0) 2(13.3) 4(26.7)
Foot and Ankle 19(65.5) 0(0) 10(34.5)
Hand and Upper Extremity 8(61.5) 0(0) 5(38.5)
Spine 17(73.9) 1(4.4) 5(21.7)
OA 22(62.9) 9(25.7) 4(11.4)