Table 1.
Demographic Characteristics for the Core and Subset Groups
| Characteristic |
Core Group | Subset Group | ||
|---|---|---|---|---|
| Cases | Controls | Cases | Controls | |
| N | 178 | 178 | 98 | 98 |
| Female sex (n [%]) | 90 (51) | 86a (49) | 48 (49) | 47a (48) |
| Age (mo) | 44.8 (11–60) | 43.8 (11–59) | 48.2 (12–67) | 47.6 (11–65) |
| Race (n [%])b | ||||
| White | 95 (53) | 130 (73) | 51 (52) | 72 (73) |
| African American | 22 (12) | 17 (10) | 13 (13) | 10 (10) |
| Asian/Pacific Islander | 21 (12) | 24 (13) | 14 (14) | 14 (14) |
| Native American | 4 (2) | 2 (1) | 2 (2) | 2 (2) |
| Other | 33 (19) | 19 (11) | 13 (13) | 10 (10) |
| Don’t know | 17 (10) | 1 (0.6) | 12 (12) | 0 (0) |
| No response | 17 (10) | 2 (1) | 12 (12) | 0 (0) |
| Ethnicity (n [%]) | ||||
| Hispanic | 47 (26) | 34 (19) | 23 (24) | 19 (19) |
| Don’t know | 8 (4) | 1 (0.6) | 6 (6) | 0 (0) |
| No response | 0 (0) | 1 (0.6) | 0 (0) | 0 (0) |
| Demographics | ||||
| Household income (thousands of US dollars)c | 48.8 (43–62) | 56 (43–64) | 50.2 (45–64) | 56.7 (46–64) |
| Case and control proximityd | 56 (31%), 66 (37%), 24 (13%) | 32 (33%), 38 (39%), 12 (12%) | ||
a
Sex was not provided for 1 control subject.
b
Percentages exceed 100 because of multiple responses by some subjects.
c
Based on 1999 US census median income of households in the participants’ zip code of residence.
d
Case and control matched sets residing in same, contiguous, or contiguous to contiguous zip codes.