Table 3—

Incidence of diabetes (per 100,000 person-years) in the cohort overall and by covariates, MMAS, Boston, MA, 1987–2004

Baseline variableCases of incident diabetes (n)Person-yearsIR per 100,000 person-years (95% CI)P value*
All cohort members9014,737.1611 (497–751)
Age-group (10-year)0.7297
    40–49 years365,752.8626 (451–868)
    50–59 years295,291.5548 (381–789)
    60–70 years253,692.9677 (457–1,002)
Education0.0011
    High school or less313,199.0969 (682–1,378)
    Some college or BA406,006.3666 (489–909)
    Advanced study beyond BA195,531.9343 (219–538)
Current smoking0.0117
    No6111,668.5523 (407–672)
    Yes293,068.6945 (657–1,360)
Hypertension0.0006
    No5411,235.7481 (368–628)
    Yes363,501.41,028 (742–1,425)
Self-rated health status0.0002
    Excellent215,501.1382 (249–585)
    Very good285,568.4503 (347–728)
    Good342,911.11,168 (835–1,635)
    Fair or poor7741.4944 (450–1,980)
Waist circumference quartile<0.0001
    Q1 (≤35 in)64,021.1149 (67–332)
    Q2 (>35 to 37.75 in)163,827.0418 (256–682)
    Q3 (>37.75 to 40.5 in)213,827.2549 (358–842)
    Q4 (>40.5 in)473,061.81,535 (1,153–2,043)
Total testosterone quartile0.0004
    Q1373,392.81,091 (790–1,505)
    Q2233,707.1620 (412–934)
    Q3153,568.4420 (253–697)
    Q4133,780.0344 (200–592)
Cortisol quartile0.8367
    Q1192,789.4681 (434–1,068)
    Q2304,622.4649 (454–928)
    Q3203,820.4524 (338–811)
    Q4203,396.9589 (380–913)
  • n = 1,139.

  • * P value based on ΔG2 statistic, which tests difference in fit of two nested models. BA, bachelor or arts degree.