Descriptives of Selected Variables for All Visits
| Variable | Medical Specialists | Surgical Specialists | Obstetrician- gynecologists | Psychiatrists | Total |
|---|---|---|---|---|---|
| ADG: aggregated diagnosis group; CI = confidence interval; SCHIP = State Children’s Health Insurance Program. | |||||
| Note: All differences across specialists (medical specialists vs obstetrician-gynecologists vs psychiatrists vs surgical specialists) were statistically significant at the defined α = .05 for all variables. | |||||
| All visits, No. (%) | 466,116,941 (36.5) | 515,694,813 (40.3) | 215,791,181 (16.9) | 80,962,250 (6.3) | 1,278,565,185 (100.0) |
| Sex, No. (%) | |||||
| Female | 260,235,334 (55.8) | 280,335,293 (54.4) | 215,106,923 (99.7) | 43,692,472 (54.0) | 799,370,022 (62.5) |
| Male | 205,881,607 (44.2) | 235,359,520 (45.6) | 684,258 (0.3) | 37,269,778 (46.0) | 479,195,163 (37.5) |
| Age, mean (95% CI), y | 53.5 (51.7–55.2) | 53.3 (52.3–54.3) | 35.8 (35.6–37.0) | 39.2 (37.2–41.3) | 49.51 (48.6–50.4) |
| Ethnicity, No. (%) | |||||
| White, non-Hispanic | 383,527,745 (82.3) | 420,962,462 (81.6) | 152,905,921 (70.9) | 69,279,960(85.6) | 1,026,676,088 (80.3) |
| Black, non-Hispanic | 34,902,735 (7.5) | 41,007,894 (8.0) | 29,297,265 (13.6) | 5,632,784 (7.0) | 110,840,678 (8.7) |
| Hispanic | 30,995,603 (6.6) | 39,971,646 (7.8) | 26,444,488 (12.3) | 4,406,438 (5.4) | 101,818,175 (8.0) |
| Asian/Pacific Islander | 16,690,858 (3.6) | 13,752,811 (2.7) | 7,143,507 (3.3) | 1,643,068 (2.0) | 39,230,244 (3.1) |
| Insurance, No. (%) | |||||
| Private insurance | 260,900,082 (57.73) | 287,431,802 (57.59) | 162,188,063 (77.03) | 41,598,513 (52.89) | 752,118,460 (60.65) |
| Medicare | 153,379,107 (33.94) | 156,063,868 (31.27) | 8,701,472 (4.13) | 9,169,539 (11.66) | 327,313,986 (26.39) |
| Medicaid/SCHIP | 23,882,076 (5.28) | 27,827,889 (5.58) | 31,535,961 (14.98) | 11,034,035 (14.03) | 94,279,961 (7.60) |
| No insurance | 13,765,906 (3.05) | 27,743,946 (5.56) | 8,113,992 (3.85) | 16,854,687 (21.43) | 66,478,531 (5.36) |
| Past visits, No. (%) | |||||
| 0 | 30,507,057 (8.08) | 45,157,061 (11.17) | 25,658,382 (13.30) | 644,906 (0.87) | 101,967,406 (9.72) |
| 1–2 | 137,679,845 (36.46) | 166,055,503 (41.08) | 65,934,794 (34.18) | 11,729,626 (15.74) | 381,399,768 (36.35) |
| 3–5 | 109,252,095 (28.93) | 120,902,884 (29.91) | 41,004,888 (21.25) | 18,993,777 (25.49) | 290,153,644 (27.65) |
| 6 or more | 100,168,775 (26.53) | 72,066,951 (17.83) | 60,333,886 (31.27) | 43,142,388 (57.90) | 275,712,000 (26.28) |
| Time spent with physician, mean (95% CI), min | 19.4 (18.3–20.4) | 17.5 (16.8–18.3) | 17.3 (16.4–18.2) | 33.1 (31.1–35.1) | 19.2 (18.6–19.7) |
| Major ADG as primary diagnosis, No. (%) | |||||
| Yes | 129,973,814 (27.9) | 86,812,987 (16.8) | 2,189,475 (1.0) | 37,648,031 (46.5) | 256,624,307 (20.1) |
| No | 336,143,127 (72.1) | 428,881,826 (83.2) | 213,601,706 (99.0 | 43,314,219 (53.5) | 1,021,940,878 (79.9) |
| Number of diagnoses, mean (95% CI) | 1.81 (1.76–1.87) | 1.62 (1.59–1.65) | 1.36 (1.31–1.41) | 1.56 (1.48–1.63) | 1.64 (1.61–1.67) |
| Visit orientation, No. (%) | |||||
| Primary care | 49,384,112 (10.6) | 19,706,986 (3.8) | 40,442,490 (18.7) | 2,979,065 (3.7) | 112,512,653 (8.8) |
| Specialty care | 416,732,829 (89.4) | 495,987,827 (96.2) | 175,348,691 (82.3) | 77,983,185 (96.3) | 1,166,052,532 (91.2) |