TABLE 1

Clinic Characteristics

CharacteristicControl Condition (30 Clinics)In-person Training (30 Clinics)Webinar Training (31 Clinics)P
N (%)N (%)N (%)
Clinic specialty
 Pediatric19 (63)16 (53)18 (58).73
 Family practicea11 (37)14 (47)13 (42)
Clinic location
 Urban/suburban22 (73)25 (83)22 (71).49
 Rural8 (27)5 (17)9 (29)
Adolescent patient load
 ≤500 patients13 (43)10 (33)11 (35)
 501–1500 patients9 (30)15 (50)14 (45).60
 >1500 patients8 (27)5 (17)6 (19)
Mean Proportion (SD)Mean Proportion (SD)Mean Proportion (SD)
Race of adolescent patientsb
 White0.50 (0.25)0.47 (0.25)0.52 (0.23).73
 Black0.30 (0.21)0.23 (0.22)0.22 (0.22).31
 Other0.04 (0.04)0.03 (0.04)0.03 (0.04).60
 Not specified0.16 (0.11)0.27 (0.23)0.23 (0.18).08
Gender of adolescent patients
 Male0.47 (0.03)0.46 (0.06)0.47 (0.04).53
 Female0.48 (0.03)0.46 (0.06)0.47 (0.05).44
 Not specified0.06 (0.04)0.08 (0.08)0.06 (0.07).34
Vaccine dose funding
 Private0.47 (0.18)0.58 (0.21)0.58 (0.18).04
 Public0.53 (0.18)0.42 (0.21)0.42 (0.18).04
  • The study conditions included 35 569 patients in the control arm, 33 482 patients in the in-person arm, and 38 392 patients in the webinar arm.

  • a Includes 1 internal medicine practice.

  • b Race/ethnicity information came from health care providers (rather than from patients or parents). This variable is not among the registry’s required fields, resulting in a higher proportion of missing data than for other variables.