Table 1.

Baseline Characteristics of Not Reassigned and Reassigned Patients

Demographic CharacteristicsNot ReassignedReassignedPValuea
ACES-SF = Ambulatory Care Experiences Survey-Short Form; PACIC = Patient Assessment of Chronic Illness Care.
a P value from χ2 test comparing percentages and from t test comparing means between reassigned and not reassigned patients.
b The ACES-SF and PACIC questions (scored on 6- and 5-point Likert scales, respectively) were totaled within the subscales and then transformed to 100-point summary scores.
Eligible patients from automated data, n6,1881,817
Age in years, n (%)
    ≤351,137 (18.4)456 (25.1)<.001
    36–45713 (11.5)333 (18.3)
    46–551,199 (19.4)411 (22.6)
    56–651,377 (22.3)359 (19.8)
    66–75870 (14.1)147 (8.1)
    ≥76892 (14.4)111 (6.1)
Male sex, n (%)2,500 (40.4)962 (52.9)<.001
DxCG case mix score, n (%)
    Low morbidity (0.10–0.87)1,732 (28.0)790 (44.0)<.001
    Moderate morbidity (0.97–1.85)2,092 (33.8)641 (35.3)
    High morbidity (1.85–106)2,364 (38.2)377 (20.8)
Length of relationship with primary care physician, n (%)
    <1 year771 (12.5)274 (15.1)<.001
    1–5 years2,300 (37.2)1,025 (56.4)
    5+ years3,117 (50.3)518 (28.5)
Continuity of care index, mean (SD)0.495 (0.382)0.442 (0.401).001
Patients assigned to newly hired doctors, n (%)356 (5.8)1,217 (67.0)<.001
Information from baseline patient survey (2006)
Patient survey complete, n938160
Education, n (%)
    Less than college127 (13.9)13 (8.4).063
    Some college279 (30.5)42 (27.3)
    College graduate or postgraduate508 (55.6)99 (64.3)
White race, n (%)801 (87.9)125 (81.2).028
Patients assigned to newly hired doctors48 (5.1)105 (65.6)<.001
Self-reported health status, n (%)
    Excellent or very good461 (51.8)80 (53.7).633
    Good302 (33.9)52 (34.9)
    Fair or poor127 (14.3)17 (11.4)
ACES-SF subscales,b mean (SD)
    Quality of doctor-patient interactions85.8 (16.3)85.1 (16.4).627
    Shared decision making85.1 (22.3)84.8 (21.7).883
    Coordination of care81.3 (21.5)79.4 (22.6).327
    Access87.1 (17.2)86.3 (19.3).645
    Helpfulness of office staff91.4 (15.6)92.3 (13.0).499
PACIC subscales,b mean (SD)
    Patient activation/involvement77.7 (27.0)72.7 (29.7).056
    Goal setting/tailoring69.0 (30.8)69.4 (31.3).893
Utilization measures (contacts per person in 2006)
Eligible patients from automated data6,1881,817
Primary care visits, mean (SD)3.67 (4.40)2.44 (2.92)<.001
Emergency department/urgent care visits, mean (SD)0.374 (0.978)0.241 (0.694)<.001
Secure message threads, mean (SD)1.29 (3.46)0.85 (2.96)<.001
Telephone encounters, mean (SD)3.74 (6.10)1.89 (3.48)<.001