Table 1

Baseline characteristics of physicians and comparison groups
Characteristics Physicians General adults
Pre-matched sample Post-matched sample
n = 1,686 % n = 81,627 % P value n=1,686 % P value
Age (years)
 25–34 651 38.6 38,478 47.1 <0.001 650 38.6 0.96
 35–44 619 36.7 30,997 38 621 36.8
 45–54 305 18.1 11,116 13.6 311 18.4
 55–64 111 6.6 1,036 1.3 104 6.2
Sex
 Female 236 14 27,342 33.5 <0.001 237 14.1 0.96
 Male 1,450 86 54,285 66.5 1,449 85.9
Major diseases
 No 1,636 97 79,148 97 0.87 1,640 97.3 0.68
 Yes 50 3 2,479 3 46 2.7
Urbanicity
 Urban 1,214 72 58,372 71.5 0.11 1,215 72.1 1.00
 Suburban 401 23.8 20,489 25.1 401 23.8
 Rural 71 4.2 2,766 3.4 70 4.2
Residential region
 North 824 48.9 53,031 65 <0.001 823 48.8 0.98
 Central 335 19.9 10,552 12.9 332 19.7
 South 485 28.8 16,829 20.6 485 28.8
 East 42 2.5 1,215 1.5 46 2.7

Wu et al.

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

Open Data