Table 1.
Characteristics of cases and controls, Tennessee Colorectal Polyp Study, 2003-2010
| Characteristic | Case (n = 216) | Control (n = 216) | p-valuea |
|---|---|---|---|
| Matching Factors | |||
| Age, mean ± SD | 58.0 (6.8) | 57.2 (6.9) | |
| White, % | 97.2 | 97.2 | |
| Male, % | 73.6 | 73.6 | |
| Academic Medical Center Recruitment, % | 65.3 | 65.3 | |
| Other Factors | |||
| Indication for Colonoscopy, % | 0.34 | ||
| Screening | 57.4 | 62.0 | |
| Family History | 14.8 | 9.3 | |
| Diagnostic | 19.4 | 19.9 | |
| Other | 8.3 | 8.8 | |
| Education, % | 0.78 | ||
| Less than high school graduate | 26.4 | 23.6 | |
| High school graduate | 27.3 | 28.2 | |
| College graduate | 22.2 | 20.8 | |
| Graduate or professional school | 24.1 | 27.3 | |
| Household Income, % | 0.01 | ||
| 0-29,999 | 31.9 | 20.1 | |
| 30,000-49,999 | 17.6 | 23.0 | |
| 50,000-74,999 | 13.3 | 12.4 | |
| ≥ 75,000 | 37.1 | 44.5 | |
| Family History of Colorectal Neoplasia, % | 0.45 | ||
| No family history | 72.4 | 77.6 | |
| Only polyps | 19.0 | 15.2 | |
| Colorectal cancer | 8.6 | 7.1 | |
| Cigarette Smoking Status, % | 0.02 | ||
| Never smoker | 35.6 | 44.7 | |
| Former smoker | 40.3 | 40.5 | |
| Current smoker | 24.1 | 14.9 | |
| Multivitamin Use, % | 46.9 | 59.2 | 0.02 |
| Regular Alcohol Use, % | 50.9 | 56.1 | 0.23 |
| Regular NSAID Use, % | 57.9 | 59.7 | 0.69 |
| Height (m), mean (SD) | 1.8 (0.1) | 1.8 (0.1) | 0.93 |
| BMI (kg/m2), mean (SD) | 28.3 (5.6) | 27.6 (5.0) | 0.19 |
| Metabolic Equivalent of Task (MET) – h/week/year in past 10 yrs, mean (SD) | 18.3 (28.9) | 18.1 (27.2) | 0.97 |
| Postmenopausalb, % | 66.7 | 71.9 | 0.47 |
| Daily Total Energy Intake (kcal), mean (SD) | 2355 (1195) | 2196 (967) | 0.38 |
| Daily Red Meat Intake (g), mean (SD) | 69.7 (62.6) | 60.1 (78.8) | 0.14 |
a
P-value derived from ANOVA for continuous variables and conditional logistic regression models for categorical variables
b
Among females only.