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Table 1 Operative treatment in the UK Hip trial

From: Assessing subgroup effects with binary data: can the use of different effect measures lead to different conclusions?

Level of clinical suspicion

Ultrasound

No Ultrasound

Risk ratio for harm (95% CI)

Risk ratio for benefit (95% CI)

Odds ratio (95% CI)

Risk difference (95% CI)

All

21/314 (7%)

25/315 (8%)

0.84 (0.48 to 1.47)

1.01 (0.97 to 1.06)

0.83 (0.46 to 1.52)

-0.01 (-0.05 to 0.03)

Strong

7/95 (7%)

11/89 (12%)

0.60 (0.24 to 1.47)

1.06 (0.96 to 1.16)

0.56 (0.21 to 1.53)

-0.05 (-0.14 to 0.04)

Moderate

14/219 (6%)

14/226 (6%)

1.03 (0.50 to 2.11)

1.00 (0.95 to 1.05)

1.03 (0.48 to 2.22)

0.00 (-0.04 to 0.05)

Test of

interaction1

  

P = 0.35

P = 0.29

P = 0.34

P = 0.30

  1. 1 Mantel-Haenszel test.