Table 2

Any hip treatment in the UK Hip trial

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
126/314 (40%)
159/315 (50%)
0.79 (0.67 to 0.95)
1.21 (1.05 to 1.40)
0.66 (0.48 to 0.90)
-0.10 (-0.18 to -0.03)

Strong
65/95 (68%)
86/89 (97%)
0.71 (0.61 to 0.82)
9.37 (2.96 to 29.62)
0.08 (0.02 to 0.24)
-0.28 (-0.38 to -0.18)
Moderate
61/219 (28%)
73/226 (32%)
0.86 (0.65 to 1.15)
1.07 (0.94 to 1.20)
0.81 (0.54 to 1.21)
-0.04 (-0.13 to 0.04)

Test of
interaction1


P = 0.14
P < 0.001
P < 0.001
P < 0.001

1 Mantel-Haenszel test.

White and Elbourne BMC Medical Research Methodology 2005 5:15   doi:10.1186/1471-2288-5-15