TABLE 2

Practice and Physician Characteristics

OverallControlInterventionP
n = 56 clinicsn = 26 clinicsn = 30 clinics
Clinic
 No. of physicians, n (%)a526236 (45)290 (55).33
 Clinics in medical group, n (%)a
  16 (11)2 (8)4 (13).87
  2–30 (0)0 (0)0 (0)
  3–52 (4)1 (4)1 (3)
  ≥648 (86)23 (88)25 (83)
 Practice type, n (%)a
  Pediatrics only18 (32)9 (35)9 (30).89
  Family medicine only36 (64)16 (62)20 (67)
  Mixed pediatric/family medicine2 (4)1 (4)1 (3)
 Childhood vaccine volume, dosesb
  Median (IQR)5488 (3250–12 005)5208 (2700–13 415)5618 (3610–10 740).78
Physician samplecn = 263 physiciansn = 118 physiciansn = 145 physicians
 Professional degree, n (%)
  DO6 (2)3 (3)3 (2)
  MD257 (98)115 (97)142 (98).81
 Specialty, n (%)
  Family medicine152 (58)56 (48)96 (67).16
  Pediatrics109 (41)61 (52)48 (33)
 Women, n (%)174 (66)76 (64)98 (68).58
 Years since medical school graduation, n (%)
  ≤1055 (21)16 (14)39 (27).07
  11–2092 (35)46 (39)46 (32)
  21–3074 (28)33 (28)41 (28)
  >3042 (16)23 (19)19 (13)
  Mean (SD)18.9 (10.2)20.2 (10.2)17.7 (10.1).12
 No. of children 0–24 mo seen per week in past 6 mo, n (%)
  1–474 (28)31 (26)48 (33).25
  5–1259 (22)22 (19)37 (26)
  13–2546 (17)17 (14)29 (20)
  >2584 (32)48 (41)36 (25)
  Mean2.53 (1.21)2.69 (1.25)2.4 (1.16).28
 Frequency of parental childhood vaccine concerns in previous 6 mo, n (%)
  Always/frequently89 (34)44 (37)45 (31).27
  Sometimes117 (44)53 (45)64 (44)
  Never/rarely57 (22)21 (18)36 (25)
 No. of clinics in medical group, n (%)
  142 (16)10 (9)32 (22).35
  2–526 (10)9 (8)17 (12)
  6 or more192 (74)98 (84)94 (66)
  • DO, Doctor of Osteopathic Medicine; IQR, interquartile range; MD, Doctor of Medicine.

  • a Publicly available data, accessed 2010.

  • b Source: Washington State Department of Health, vaccine ordering data, 2012.

  • c Assessed by self-administered survey.