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Table 3 Sub-group analysis of item responses by anatomical region (article n = 240)

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

Randomization

Yes (%)

No (%)

Not reported (%)

Spine& Neck

14(60.9)

0(0)

9(39.1)

Upper Extremity

32(78.1)

3(7.3)

6(14.6)

Lower Extremity

112(67.9)

14(8.5)

39(23.6)

Mixed

7(70.0)

0(0)

3(30.0)

Allocation concealment

Spine& Neck

14(60.9)

0(0)

9(39.1)

Upper Extremity

32(78.1)

3 (7.3)

6(14.6)

Lower Extremity

111(67.3)

12(7.3)

42(25.5)

Mixed

7(70.0)

0(0)

3(30.0)

Blinding of Participants

Spine& Neck

6(26.1)

7(30.4)

10(43.5)

Upper Extremity

6(14.6)

8(19.5)

27(65.9)

Lower Extremity

35(21.2)

34(20.6)

96(58.2)

Mixed

2(20.0)

2(20.0)

6(60.0)

Blinding of Outcome Assessors

Spine& Neck

11(47.8)

3(13.0)

9(39.1)

Upper Extremity

18(43.9)

10(24.4)

13(31.7)

Lower Extremity

82(49.7)

24(14.6)

59(35.8)

Mixed

7(70.0)

1(10.0)

2(20.0)

Outcome Measurement

Spine& Neck

21(91.3)

0(0)

2(8.7)

Upper Extremity

39(95.1)

0(0)

2(4.9)

Lower Extremity

156(94.6)

2(1.2)

7(4.2)

Mixed

9(90.0)

0(0)

1(10.0)

Similarly Trained Individuals

Spine& Neck

5(21.7)

0(0)

18(78.3)

Upper Extremity

24(58.5)

1(2.4)

16(39.0)

Lower Extremity

81(49.1)

2(1.2)

82(49.7)

Mixed

3(30.0)

0(0)

7(70.0)

Compliance with Intervention

Spine& Neck

13(56.5)

10(43.5)

0(0)

Upper Extremity

29(70.7)

12(29.3)

0(0)

Lower Extremity

119(72.1)

45(27.3)

1(0.6)

Mixed

5(50.0)

5(50.0)

0(0)

Intent to Treat Analysis

Spine& Neck

9(39.1)

1(4.4)

13(56.5)

Upper Extremity

20(48.8)

1(2.4)

20(48.8)

Lower Extremity

70(42.4)

2(1.2)

93(56.4)

Mixed

4(40.0)

0(0)

6(60.0)

Clustering

Spine& Neck

0(0)

0(0)

23(100)

Upper Extremity

0(0)

0(0)

41(100)

Lower Extremity

1(0.6)

0(0)

164(99.4)

Mixed

0(0)

0(0)

10(100)

Similar at Baseline

Spine& Neck

17(73.9)

1(4.4)

5(21.7)

Upper Extremity

30(73.2)

0(0)

11(26.8)

Lower Extremity

117(70.9)

16(9.7)

32(19.4)

Mixed

4(40.0)

3(30.0)

3(30.0)