Table 1—

Demographic, clinical, and treatment characteristics of patients with diabetes in the 12 primary care practices of the Massachusetts General Hospital practice–based research network

Community health centersHospital-based practicesPrivate practicesTotal
Clinics43512
n3,1043,4591,1297,692
Patient demographics
    Women (%)53.245.645.548.6
    Age (years)61.6 (15)64.7 (13)64.1 (14)63.3 (14)
    Insurance (%)
Commercial27.536.645.634.4
Medicare46.650.045.047.9
Medicaid14.98.45.910.6
Uninsured11.13.73.57.1
    Household income ($)*45,046 (28,260)72,956 (68,653)86,376 (84,376)63,028 (60,917)
    Nonwhite race (%)34.324.023.328.1
    English speaking (%)76.795.197.888.1
Clinical characteristics
    CVD (%)23.629.626.726.7
    BMI (kg/m2)32.3 (7)32.4 (7)31.1 (7)32.2 (7)
    Current smoking (%)16.415.87.414.8
Clinical management
    Visits in prior year7.8 (6)9.8 (6)7.5 (7)7.9 (6)
    Total medications9.2 (5)10.3 (6)8.8 (5)9.6 (5)
    Mean A1C (%)7.66 (1.7)7.38 (1.5)7.45 (1.4)7.51 (1.6)
    A1C <7.0 (%)40.345.143.943
    Glycemic treatment (%)
Diet only17.323.118.720.1
Oral medicines58.448.159.456.2
Any insulin24.328.821.923.7
    Mean blood pressure129/74 (19/11)132/74 (20/11)130/73 (19/12)130/74 (19/11)
    Blood pressure <130/80 (mmHg) (%)37.636.740.037.7
    Hypertension treatment (%)80.681.078.589.2
    Mean LDL cholesterol level (mg/dl)91.3 (33)89.2 (31)87.3 (32)89.2 (32)
    LDL cholesterol <100 (%) (mg/dl)66.270.868.368.7
    All three risk factors at goal (%)7.86.311.27.6
  • Data are n and proportions or means (SD).

  • *

    * Household income based on federal tax returns from patients’ home zip code.

  • Three risk factors: A1C, blood pressure, and LDL cholesterol.