Table 1. Demographics for mITT Sample.
| Variable | No. (%) | |||||
|---|---|---|---|---|---|---|
| Overall | Cohort 1 | Cohort 2 | Cohort 3 | Cohort 4 | Cohort 5 | |
| PCP participants, No. | 132 | 27 | 33 | 29 | 28 | 15 |
| Age, median (IQR), y | 46 (37-55) | 43 (36-55) | 49 (45-60) | 45 (37-53) | 46 (36-55.5) | 39 (36-50) |
| Sex | ||||||
| Female | 108 (82) | 21 (78) | 26 (79) | 23 (79) | 23 (82) | 15 (100) |
| Race | ||||||
| White | 100 (76) | 21 (78) | 23 (70) | 23 (79) | 20 (71) | 13 (87) |
| Black or African American | 7 (5) | 2 (7) | 2 (6) | 2 (7) | 1 (4) | 0 |
| Asian | 21 (16) | 3 (11) | 8 (24) | 3 (10) | 6 (21) | 1 (7) |
| Other/multiracial | 4 (3) | 1 (4) | 0 | 1 (3) | 1 (4) | 1 (7) |
| Ethnicity | ||||||
| Hispanic or Latino | 8 (6) | 2 (7) | 0 | 2 (7) | 4 (14) | 0 |
| Specialty | ||||||
| General pediatrician | 100 (76) | 18 (67) | 30 (91) | 23 (79) | 20 (71) | 9 (60) |
| Internal medicine–pediatrics physician | 6 (5) | 3 (11) | 1 (3) | 1 (3) | 1 (4) | 0 |
| Family medicine physician | 7 (5) | 1 (4) | 1 (3) | 2 (7) | 1 (4) | 2 (13) |
| Nurse practitioner | 15 (11) | 5 (19) | 1 (3) | 2 (7) | 3 (11) | 4 (27) |
| Physician assistant | 2 (2) | 0 | 0 | 1 (3) | 1 (4) | 0 |
| Other | 2 (2) | 0 | 0 | 0 | 2 (7) | 0 |
| Years in practice, median (IQR) | 13.5 (6-22.5) | 13 (2.5-23) | 19 (11-25) | 12 (7-17) | 13.5 (5.5-25.5) | 7 (5-15) |
| Children seen at practice per y, median (IQR) | 3000 (1302-4000) | 3500 (2079-4500) | 3000 (1000-4000) | 2880 (1000-3600) | 2600 (2000-4200) | 1504 (700-3700) |
| Additional training in autism | 62 (47) | 18 (67) | 13 (39) | 11 (38) | 14 (50) | 6 (40) |
| Type of additional traininga | ||||||
| Content within a graduate course (not autism-specific) | 13 (21) | 6 (33) | 2 (15) | 1 (9) | 1 (7) | 3 (50) |
| Specific graduate course on autism | 5 (8) | 1 (6) | 1 (8) | 2 (18) | 0 | 1 (17) |
| Workshop | 23 (37) | 5 (28) | 4 (31) | 4 (36) | 7 (50) | 3 (50) |
| Conference presentation | 17 (27) | 4 (22) | 3 (23) | 2 (18) | 6 (43) | 2 (33) |
| Continuing medical education seminar | 30 (48) | 9 (50) | 7 (54) | 6 (55) | 6 (43) | 2 (33) |
| Webinar | 6 (10) | 0 | 1 (8) | 4 (36) | 0 (0) | 1 (17) |
| Residency rotation during residency | 23 (37) | 5 (28) | 7 (54) | 3 (27) | 6 (43) | 2 (33) |
| Medical school rotation | 7 (11) | 3 (17) | 2 (15) | 1 (9) | 1 (7) | 0 |
| Practice setting | ||||||
| Academic medical center | 21 (16) | 7 (26) | 2 (6) | 3 (10) | 5 (18) | 4 (27) |
| Federally qualified health center | 13 (10) | 3 (11) | 1 (3) | 1 (3) | 2 (7) | 6 (40) |
| Multiple settings | 10 (8) | 0 | 4 (12) | 4 (14) | 2 (7) | 0 |
| Solo practice | 20 (15) | 1 (4) | 12 (36) | 2 (7) | 5 (18) | 0 |
| Private group practice | 50 (38) | 10 (37) | 11 (33) | 13 (45) | 14 (50) | 2 (13) |
| Other | 18 (14) | 6 (22) | 3 (9) | 6 (21) | 0 | 3 (20) |
Abbreviations: IQR, interquartile range; mITT, modified intent-to-treat; PCP, primary care physician or practitioner.
a
Percentages are of those with any additional training in autism.