Comparison of industry total payment value according to physician characteristics
| Mean value of payments | Adjusted % difference (95% CI) | P value | ||
| Unadjusted | Adjusted (95% CI) | |||
| Sex | ||||
| Female | $1090 | $1650 (1149 to 2151) | Ref | – |
| Male | $4735 | $4164 (3304 to 5025) | +152% (+85% to+244%) | <0.001 |
| Years in practice | ||||
| ≤10 | $632 | $906 (663 to 1148) | Ref | – |
| 11–20 | $2712 | $3180 (2420 to 3941) | +251% (+135% to+424%) | <0.001 |
| 21–30 | $5160 | $5231 (3495 to 6966) | +478% (+304% to+726%) | <0.001 |
| >30 | $4930 | $3878 (3342 to 4414) | +328% (+228% to+460%) | <0.001 |
| Medical school attended* | ||||
| Top 20 school in USA | $5249 | $3759 (3265 to 4254) | Ref | – |
| US schools ranked 21–50 | $5527 | $5477 (2604 to 8350) | +46% (-8% to +131%) | 0.11 |
| Other schools | $2830 | $3003 (2687 to 3320) | −20% (-31% to -7%) | 0.004 |
| Specialty | ||||
| Primary care | ||||
| Internal Medicine | $1747 | $2641 (1260 to 4022) | Ref | – |
| Family Medicine | $2590 | $1515 (323 to 2706) | −43% (−73% to +23%) | 0.15 |
| Paediatrics | $669 | $1050 (742 to 1359) | −60% (-78% to -27%) | 0.003 |
| Hospitalist | $208 | $312 (212 to 412) | −88% (-94% to -78%) | <0.001 |
| Surgery | ||||
| Orthopaedic | $23 897 | $18 650 (14 475 to 22826) | +606% (+327% to+1067%) | <0.001 |
| Neurosurgery | $20 156 | $15 937 (7861 to 24012) | +503% (+204% to+1098%) | <0.001 |
| Thoracic/Vascular | $5804 | $4580 (3473 to 5686) | +73% (+3% to+192%) | 0.04 |
| Urology | $4849 | $4381 (3461 to 5300) | +66% (-3% to +182%) | 0.06 |
| Colorectal | $3417 | $3252 (2300 to 4204) | +23% (-32% to +122%) | 0.49 |
| General | $2791 | $2983 (2294 to 3672) | +13% (-35% to +95%) | 0.66 |
| Plastic | $2650 | $2467 (1894 to 3040) | −7% (−47% to +64%) | 0.81 |
| Otolaryngology | $1400 | $1333 (1062 to 1604) | −50% (-70% to -14%) | 0.01 |
| Obstetrics/Gynaecology | $932 | $1249 (921 to 1578) | −53% (-74% to -15%) | 0.01 |
| Specialists | ||||
| Endocrinology | $11 327 | $11 829 (9350 to 14309) | +348% (+152% to+695%) | <0.001 |
| Rheumatology | $7252 | $8049 (5982 to 10117) | +205% (+73% to+436%) | <0.001 |
| Haematology/Oncology | $7578 | $7676 (6288 to 9063) | +191% (+68% to+402%) | <0.001 |
| Neurology | $6244 | $7592 (5938 to 9247) | +188% (+65% to+402%) | <0.001 |
| Dermatology | $4239 | $5238 (4169 to 6307) | +98% (+12% to+251%) | 0.02 |
| Cardiology | $6024 | $4932 (4219 to 5646) | +87% (+15% to+204%) | 0.01 |
| Allergy/Immunology | $4625 | $4729 (3582 to 5876) | +79% (+3% to+211%) | 0.04 |
| Ophthalmology | $4659 | $4487 (2406 to 6568) | +70% (-13% to +232%) | 0.12 |
| Gastroenterology | $4214 | $3730 (3026 to 4434) | +41% (-16% to +138%) | 0.20 |
| Infectious Diseases | $2713 | $2658 (2034 to 3281) | +1% (-44% to +80%) | 0.98 |
| Pulmonology | $2889 | $2462 (2020 to 2904) | −7% (−45% to +57%) | 0.79 |
| Paediatric Specialty | $1877 | $1970 (1412 to 2528) | −25% (−59% to +35%) | 0.33 |
| Psychiatry | $1722 | $1852 (1229 to 2476) | −30% (−62% to +29%) | 0.25 |
| Radiology | $2141 | $1854 (1340 to 2368) | −30% (−60% to +22%) | 0.21 |
| Nephrology | $1825 | $1694 (1188 to 2199) | −36% (−64% to +13%) | 0.12 |
| Rehabilitation | $1188 | $1471 (1122 to 1820) | −44% (-68% to -4%) | 0.03 |
| Emergency Medicine | $1400 | $1341 (379 to 2303) | −49% (−78% to +18%) | 0.11 |
| Anaesthesiology | $1088 | $1106 (836 to 1375) | −58% (-75% to -29%) | <0.001 |
| Others† | $1790 | $1638 (1200 to 2075) | −38% (−65% to +10%) | 0.10 |
*Defined based on the U.S. News & World Report ranking (research ranking) in 2017.
†Others include surgical oncology, oral surgery, radio oncology, pathology, nuclear medicine and so on.