Table 3. Longitudinal Growth Curve Model for HRQoL (QWB-SA) within Severity of Illness Subgroups (CPCI Scores Were Not Transformed)
Independent VariablesParameter Estimate (SE)F StatisticP
Disabled
    Age−0.002 (0.001)2.590.11
    Sex (female)0.02 (0.02)0.680.41
    Marital status (married)−0.001 (0.02)0.000.96)
    Education (compared with more than high school)0.380.69
        Less than high school−0.01 (0.02)
        High school0.01 (0.02)
    Income (compared with >$35,000)0.900.41
         <$15,000−0.03 (0.03)
        $15,000–$35,000−0.0003 (0.02)
    Body mass index0.001 (0.001)0.440.51
    General Health (SF-36)0.002 (0.0005)25.81<0.0001
    Morbidity Index−0.02 (0.01)4.290.04
    Visits with other providers−0.003 (0.005)0.410.52
    Years with current PCP−0.0001 (0.001)0.010.91
    CPCI*
        Comprehensive(0–6)0.001 (0.01)0.010.93
        Accumulated knowledge(0–6)0.003 (0.01)0.080.78
        Communication(0–6)0.004 (0.01)0.220.64
        Preference for regular doctor (0–6)−0.01 (0.01)0.660.42
        Coordination (0–6)−0.01 (0.01)0.470.49
        Advocacy (0–6)−0.01 (0.01)0.250.62
        Family (0–6)3.32 e−6(0.01)0.000.90
        Community (0–6)0.01 (0.01)0.900.34
        UPC (0–1)0.05 (0.03)2.840.09
    Total CPCI (0–49)0.0004 (0.002)0.060.81
Nondisabled, high users
    Age−0.003 (0.001)3.830.05
    Sex (female)−0.008 (0.02)0.290.59
    Marital status (married)0.009 (0.02)0.230.63
    Education (compared with more than high school)
        Less than high school0.029 (0.02)
        High school0.007 (0.02)
    Income (compared with >$35,000)0.350.71
         <$15,000−0.02 (0.03)
        $15,000–$35,000−0.01 (0.02)
    Body mass index−0.003 (0.001)3.850.05
    General Health (SF-36)0.003 (0.0005)26.31<0.0001
    Morbidity Index−0.01 (0.01)2.580.11
    Visits with other providers−0.01 (0.004)2.820.09
    Years with current PCP0.0004 (0.0009)0.160.69
    CPCI*
        Comprehensive (0 to 6)−0.01 (0.01)0.220.64
        Accumulated knowledge (0 to 6)−0.002 (0.01)0.040.85
        Communication (0–6)−0.002 (0.01)0.050.83
        Preference for regular doctor (0–6)−0.01 (0.01)0.420.52
        Coordination (0–6)0.002 (0.01)0.030.86
        Advocacy (0–6)−0.01 (0.01)0.990.32
        Family (0–6)0.01 (0.01)4.300.04
        Community (0–6)−0.01 (0.01)1.570.21
        UPC (0–1)0.01 (0.04)0.050.83
    Total CPCI (0–49)−0.0005 (0.002)0.090.77
Nondisabled, low users
    Age−0.003 (0.0009)10.430.001
    Sex (female)0.02 (0.01)2.650.10
    Marital status(married)0.02 (0.01)2.310.13
    Education (compared with more than high school)1.450.24
        Less than high school0.020 (0.02)
        High school0.02 (0.01)
    Income (compared with >$35,000)0.280.76
         <$15,000−0.01 (0.02)
        $15,000–$35,000−0.01 (0.01)
    Body mass index−0.002 (0.001)2.740.10
    General Health (SF-36)0.002 (0.0003)39.06<0.0001
    Morbidity Index−0.01 (0.005)6.910.009
    Visits with other providers0.002 (0.003)0.680.41
    Years with current PCP0.001 (0.001)2.090.15
    CPCI*
        Comprehensive (0–6)−0.01 (0.01)0.940.33
        Accumulated knowledge (0–6)−0.003 (0.01)0.290.59
        Communication (0–6)0.01 (0.01)1.520.22
        Preference for regular doctor (0–6)−0.001 (0.01)0.010.94
        Coordination (0–6)0.01 (0,01)4.040.05
        Advocacy (0–6)−0.002 (0.01)0.040.84
        Family (0–6)0.003 (0.004)0.670.41
        Community (0–6)−0.002 (0.004)0.230.63
        UPC (0–1)0.04 (0.02)5.190.02
    Total CPCI (0–49)0.0005 (0.001)0.250.62

  • ↵* CPCI total and subscale scores were entered separately (10 separate models are represented).

  • HRQoL, health-related quality of life; QWB-SA, Quality of Well-Being Self-administered Scale; CPCI, Components of Primary Care Index (scale 0–5 for subscales, 0–40 for total); PCP, primary care physician; UPC, proportion of care from PCP.