Table 4

Additional analysis (PASS 2): training and validation, final models

VariableOR (95% CI)p value
Training data set a*
 Age1.06 (1.03–1.10)0.001
 Global rating of pain1.29 (1.12–1.50)0.001
 PASS 20.54 (0.25–1.15)0.11
 Willingness3.77 (1.40–10.17)0.009
 Tried injections1.79 (0.93–3.43)0.08
Validation data set b
 Age1.02 (0.99–1.06)0.18
 BMI1.06 (1.00–1.11)0.05
 Bi/Uni Symptoms0.50 (0.25–1.00)0.05
 Global rating of pain1.12 (0.95–1.31)0.17
 PASS 20.23 (0.10–0.53)0.001
 Willingness8.67 (2.64–28.46)< 0.001
 Tried injections1.62 (0.82–3.21)0.16
 Allied health0.43 (0.12–1.50)0.19
  • BMI = body mass index; CI = confidence interval; OR = odds ratio.

  • * −2Logl = 226.117; Hosmer-Lemeshow χ28df = 7.74, p = 0.46. Final training model following 5 deletions.

  • −2Logl = 205.917; Hosmer–Lemeshow χ28df = 7.75, p = 0.46. Final training model following 2 deletions.