Table 1.
Selected characteristics of cases and controls, Markers of Adenomatous Polyps (MAP) Study
| Variable | Cases (n=162) | Controls (n=211) | P valuea |
|---|---|---|---|
| Demographic and major risk factors | |||
| Age (years) | 58.5 (8.6) | 56.0 (9.9) | 0.02 |
| Male (%) | 58.6 | 34.6 | <0.0001 |
| White race (%) | 87.7 | 90.0 | 0.48 |
| College education (%) | 18.5 | 24.2 | 0.31 |
| Family history of colorectal cancer (%) | 19.9 | 36.5 | 0.0005 |
| Currently smoke cigarettes (%) | 30.3 | 19.0 | 0.01 |
| Currently drink alcohol (%) | 54.4 | 43.1 | 0.02 |
| Aspirin or NSAID use (%)b | 47.5 | 54.0 | 0.21 |
| Total physical activity (METs/day)c | 50.0 (15.7) | 51.3 (13.8) | 0.25 |
| Dietary intakes | |||
| Total energy (kcal/day) | 2,023 (760) | 1,968 (720) | 0.88 |
| Total fat (g/day) | 70.7 (33.5) | 65.5 (29.8) | 0.49 |
| Total polyunsaturated fat (g/day) | 13.7 (5.9) | 13.0 (6.6) | 0.77 |
| Total linoleic acids (g/day) | 11.9 (5.3) | 11.2 (6.0) | 0.26 |
| Total red meat (servings/week) | 4.6 (4.4) | 4.0 (3.3) | 0.16 |
| Total fruits and vegetables (servings/day) | 6.4 (3.5) | 6.4 (3.8) | 0.95 |
| Body measurement | |||
| Body mass index (kg/m2) | |||
| X̄ ± SD | 26.4 (5.9) | 26.6 (5.3) | 0.98 |
| <25 (%) | 35.8 | 38.9 | 0.83 |
| 25 to <30 | 37.7 | 36.0 | |
| ≥30 | 26.5 | 25.1 |
Continuous variables presented as mean (SD) and categorical variables as proportions (percent)
a
For categorical variables, based on χ2 test, and for continuous variables, based on analysis of covariance (ANCOVA) for age- and sex-adjusted mean differences (exception: age variable adjusted only for sex)
b
Nonsteroidal anti-inflammatory drug
c
Metabolic equivalents=the equivalent of a person’s energy expenditure at rest