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Table 2 ES of tanezumab on pain as measured by WOMAC Pain score based on bootstrap samples

From: Effect size varies based on calculation method and may affect interpretation of treatment effect: an illustration using randomised clinical trials in osteoarthritis

ES, mean (95% CI)

Study 1 (vs. placebo)

Study 2 (vs. placebo)

Study 3 (vs. NSAID)

Tanezumab 2.5 mg (N = 231)

Tanezumab 2.5/5 mg (N = 233)

Tanezumab 2.5 mg (N = 283)

Tanezumab 5 mg (N = 284)

Tanezumab 2.5 mg (N = 1002)

Tanezumab 5 mg (N = 998)

Pooled baseline SD

−0.416

(− 0.796, − 0.060)

−0.569

(− 0.952, − 0.179)

−0.547

(− 0.900, − 0.208)

−0.691

(− 1.06, − 0.352)

−0.167

(− 0.324, 0.001)

−0.255

(− 0.454, − 0.062)

Pooled SD at the time when the primary endpoints were assessed*

−0.195

(− 0.371, − 0.028)

−0.267

(− 0.447, − 0.085)

−0.250

(− 0.403, − 0.095)

−0.316

(− 0.482, − 0.163)

−0.084

(− 0.163, 0.001)

−0.128

(− 0.228, − 0.032)

Median of pooled SD from baseline to the time when the primary endpoints were assessed*

−0.196

(− 0.373, − 0.028)

−0.268

(− 0.444, − 0.085)

−0.256

(− 0.414, − 0.098)

−0.323

(− 0.492, − 0.165)

−0.085

(− 0.165, 0.001)

−0.129

(− 0.231, − 0.032)

  1. CI: confidence interval; ES: effect size; NSAID: nonsteroidal anti-inflammatory drug; SD: standard deviation; WOMAC: Western Ontario and McMasters Universities Osteoarthritis Index
  2. * Week 16 for Studies 1 and 3, Week 24 for Study 2