Table 2

Utilization of radiology modalities per 1,000 person-years
Modality Physicians General adults Rate ratio 95% CI P value
n=1,686 n=1,686
X-ray 379 570 0.66 0.65–0.68 <0.001
 Ambulatory care 329 493 0.67 0.65–0.69 <0.001
 Inpatient care 50 77 0.65 0.60–0.70 <0.001
Sonography 146 156 0.94 0.90–0.99 0.02
 Ambulatory care 138 147 0.94 0.89–0.99 0.02
 Inpatient care 8 9 0.89 0.72–1.11 0.28
Computed tomography 26 21 1.24 1.09–1.41 0.001
 Ambulatory care 21 18 1.17 1.01–1.35 0.03
 Inpatient care 5 3 1.66 1.19–2.31 0.002
Magnetic resonance imaging 32 14 2.29 1.84–2.87 <0.001
 Ambulatory care 29 10 2.90 2.26–3.77 <0.001
 Inpatient care 3 4 0.74 0.42–1.27 0.25
Radioisotope scanning 10 10 1.00 0.73–1.37 1.00
 Ambulatory care 8 8 1.00 0.70–1.42 1.00
 Inpatient care 2 2 1.00 0.48–2.08 1.00
Positron emission tomography 0.9 0.5 2.00 0.54–9.08 0.27
 Ambulatory care 0.7 0.4 2.00 0.43–12.36 0.34
 Inpatient care 0.2 0.1 2.00 0.10–118 0.63
Interventional procedures 12 17 0.71 0.60–0.83 <0.001
 Ambulatory care 9 14 0.64 0.535–0.78 <0.001
 Inpatient care 3 3 1.00 0.69–1.45 1.00

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

Open Data