Table 1.
Characteristics of Physicians and Their Practices, by Practice Size
| Characteristic | Solo | Small (2–5 Providers) | Medium (6–20 Providers) | Large (>20 Providers) | P Value |
|---|---|---|---|---|---|
| Family physicians, No. (%)a | 1,677 (15.4) | 3,913 (35.9) | 3,371 (31.0) | 1,927 (17.7) | – |
| Sex, No. (%)b | |||||
| Male | 1,130 (67.4) | 2,459 (62.8) | 2,086 (62.9) | 1,216 (63.1) | |
| Female | 547 (32.6) | 1,454 (37.2) | 1,285 (38.1) | 711 (36.9) | .002 |
| Race, No. (%)b | |||||
| White | 1,258 (75.0) | 3,208 (82.0) | 2,763 (82.0) | 1,514 (78.6) | <.001 |
| Black or African American | 134 (8.0) | 237 (6.1) | 186 (5.5) | 99 (5.1) | .001 |
| Asian | 257 (15.3) | 404 (10.3) | 366 (10.9) | 272 (14.1) | <.001 |
| Others | 28 (1.7) | 64 (1.6) | 56 (1.7) | 42 (2.2) | .46 |
| Ethnicity, No. (%)b | |||||
| Non-Hispanic | 1,544 (92.1) | 3,700 (94.6) | 3,212 (95.3) | 1,801 (93.5) | <.001 |
| Hispanic | 133 (7.9) | 213 (5.4) | 159 (4.7) | 126 (6.5) | <.001 |
| Years in practice, No. (%)b | |||||
| 0–10 | 316 (18.8) | 1,137 (29.1) | 1,000 (29.7) | 542 (28.1) | <.001 |
| 11–20 | 592 (35.3) | 1,291 (33.0) | 985 (29.2) | 583 (30.3) | <.001 |
| 21–30 | 510 (30.4) | 1,099 (28.1) | 1,046 (31.0) | 613 (31.8) | <.009 |
| ≥31 | 259 (15.4) | 385 (9.8) | 340 (10.1) | 189 (9.8) | <.001 |
| Percent of county earning <100% of FPL | 14.9 | 14.5 | 14.7 | 14.7 | <.000 |
| Rurality of county, No. (%)b | |||||
| Urban | 1,402 (83.6) | 3,117 (79.7) | 2,799 (83.0) | 1,755 (91.1) | <.001 |
| Rural: 20,000–50,000 people | 113 (6.7) | 271 (6.9) | 255 (7.6) | 101 (5.2) | .01 |
| Rural: 2,500–19,999 people | 149 (8.9) | 428 (10.9) | 280 (8.3) | 69 (3.6) | <.001 |
| Rural: <2,500 people | 13 (0.8) | 97 (2.5) | 37 (1.1) | 2 (0.1) | <.001 |
| Combined rural | 275 (16.4) | 796 (20.3) | 572 (17.0) | 172 (8.9) | <.001 |
| Region of country, No. (%) | |||||
| North | 262 (15.6) | 629 (16.1) | 488 (14.5) | 202 (10.5) | <.001 |
| South | 704 (41.1) | 1,387 (35.4) | 966 (28.7) | 517 (26.8) | <.001 |
| West | 328 (19.6) | 748 (19.1) | 910 (27.0) | 671 (34.8) | <.001 |
| Midwest | 355 (21.2) | 1,096 (28.0) | 961 (28.5) | 525 (27.2) | <.001 |
FPL = federal poverty level.
a
Percentage across groups.
b
Percentage within groups.