Table 4. Characteristics of subjectsa included in the IGF1 genotype/breast cancer risk analysis by racial/ethnic group.
| African American | Japanese American | Non-Latino White | Latino-American | P-homob | |
|---|---|---|---|---|---|
| Variable | (cases/controls) | (cases/controls) | (cases/controls) | (cases/controls) | (cases/controls) |
| No. of subjects | 81/91 | 76/94 | 82/92 | 81/96 | |
| Mean age (years) | 68.1/67.9 | 68.5/68.4 | 68.9/67.6 | 68.4/67.0 | 0.85/0.47 |
| P (t-test)c | 0.88 | 0.85 | 0.15 | 0.13 | |
| Mean height (in) | 64.4/64.4 | 60.9/60.6 | 64.0/63.7 | 61.8/62.2 | <0.0001/<0.0001 |
| P (t-test)c | 0.82 | 0.47 | 0.48 | 0.19 | |
| Mean weight (lbs) | 171.9/166.9 | 125.6/122.3 | 150.9/147.4 | 150.0/151.9 | <0.0001/<0.0001 |
| P (t-test)c | 0.36 | 0.30 | 0.45 | 0.69 | |
| Mean BMI (kg m−2) | 29.2/28.3 | 23.8/23.4 | 26.0/25.6 | 27.7/27.6 | <0.0001/<0.0001 |
| P (t-test)c | 0.30 | 0.41 | 0.58 | 0.85 |
a
Of the 373 controls selected for this case–control data set, 134 overlapped with controls selected for the plasma IGF1 by racial/ethnic group analysis (Tables 1, 2 and 3).
b
P-value for homogeneity across all four racial/ethnic groups: cases/controls.
c
P-value for difference between means between cases vs controls.