TABLE 4

Odds Ratios Estimates and 95% Wald Confidence Intervals for Choice of a Chiropractor in Subgroups of Patientsa

Patient Subgroup
VariableAcuteChronicInsurance PaySelf-pay
Baseline Oswestry0.98 (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 scale1.16 (1.07, 1.26)Elim1.11 (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)Elim1.66 (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 Plan0.04 (0.01, 0.12)0.013 (0.003, 0.052)NANA
    Insurance0.14 (0.08, 0.23)0.052 (0.02, 0.15)NANA
    Workers’ compensation0.17 (0.08, 0.35)0.086 (0.02, 0.36)NANA
    Auto insuranceElim0.043 (0.008, 0.23)NANA
    Other0.23 (0.1, 0.54)0.054 (0.012, 0.23)NANA

Note. Elim = variable eliminated during backward elimination process; NA = not applicable.

aAll subgroup analyses were performed using the full set of potential predictors.