Table 6

Multiple logistic regression for prediction of usage of X-ray
Variables Odds ratio 95% CI P value
Physicians
 No 1.00
 Yes 0.85 0.72–0.99 0.04
Age (y)
 25–34 1.00
 35–44 0.81 0.68–0.97 0.02
 45–54 1.38 1.09–1.75 0.008
 55–65 2.03 1.34–3.07 0.001
Sex
 Female 1.00
 Male 0.83 0.66–1.05 0.13
Major diseases
 No 1.00
 Yes 29.21 4.06–210.19 0.001
Urbanicity
 Urban 1.00
 Suburban 0.94 0.77–1.14 0.54
 Rural 1.24 0.80–1.93 0.33
Residential region
 North 1.00
 Central 1.27 1.01–1.60 0.04
 South 1.03 0.85–1.24 0.80
 East 1.87 1.04–3.39 0.04

95% CI: 95% confidence interval.

Wu et al.

Wu et al. BMC Health Services Research 2013 13:284   doi:10.1186/1472-6963-13-284

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