TABLE 4
Odds Ratios Estimates and 95% Wald Confidence Intervals for Choice of a Chiropractor in Subgroups of Patientsa
Patient Subgroup Variable Acute Chronic Insurance Pay Self-pay Baseline Oswestry 0.98 (0.96, 0.99) 0.96 (0.94, 0.98) 0.97 (0.96, 0.98) 0.97 (0.95, 0.99) HOS score behavior subscale on 9-point scale 1.16 (1.07, 1.26) Elim 1.11 (1.02, 1.22) 1.34 (1.22, 1.61) Trusts MDs (agree = 1) 0.092 (0.034, 0.25) 0.077 (0.02, 0.3) 0.073 (0.02, 0.29) 0.11 (0.013, 0.94) Trusts DCs (agree = 1) 23.32 (12.83, 42.36) 43.28 (14.4, 13.02) 55.26 (24.68, 123.74) 5.52 (1.7, 17.9) Against taking prescription drugs (agree = 1) 1.62 (1.07, 2.44) Elim 1.66 (1.03, 2.67) Elim Confidence in provider’s ability to successfully treat LBP (has confidence = 1) 6.39 (3.56, 11.47) 4.58 (2.1, 10.0) 6.66 (3.61, 12.28) 4.55 (1.55, 13.34) MDs and DCs are equally skilled in treating LBP (agree = 1) 0.40 (0.27, 0.59) 0.34 (0.18, 0.65) 0.35 (0.22, 0.54) Elim Payer Oregon Health Plan 0.04 (0.01, 0.12) 0.013 (0.003, 0.052) NA NA Insurance 0.14 (0.08, 0.23) 0.052 (0.02, 0.15) NA NA Workers’ compensation 0.17 (0.08, 0.35) 0.086 (0.02, 0.36) NA NA Auto insurance Elim 0.043 (0.008, 0.23) NA NA Other 0.23 (0.1, 0.54) 0.054 (0.012, 0.23) NA NA Note. Elim = variable eliminated during backward elimination process; NA = not applicable.
aAll subgroup analyses were performed using the full set of potential predictors.