Table 1.
Summary statistics for demographic and CRC related risk factors, by case/control status
| Cases | Controls | ||
|---|---|---|---|
|
|
|||
| N = 29842 | N = 39635 | P-value | |
|
|
|||
| Red meat intake (servings/day)a | |||
| Mean (SD) | 0.60 (± 0.46) | 0.54 (± 0.44) | <0.001 |
| Missing | 70 (0.2%) | 69 (0.2%) | |
| Processed meat intake (servings/day)a | |||
| Mean (SD) | 0.36 (± 0.35) | 0.28 (± 0.29) | <0.001 |
| Missing | 2930 (9.8%) | 2395 (6.0%) | |
| Ageb | |||
| Mean (SD) | 64.2 (± 10.8) | 63.5 (± 9.42) | <0.001 |
| Sex | |||
| Female | 14569 (48.88%) | 19615 (49.52%) | 0.082 |
| Male | 15273 (51.2%) | 20020 (50.48%) | |
| Height (cm) | |||
| Mean (SD) | 169 (± 9.56) | 169 (± 9.53) | 0.314 |
| Missing | 411 (1.4%) | 282 (0.7%) | |
| BMI | |||
| Mean (SD) | 27.4 (± 4.90) | 27.0 (± 4.62) | <0.001 |
| Missing | 1492 (5.0%) | 1459 (3.7%) | |
| BMI | |||
| Normal (18.5 to <25 kg/m2) | 9286 (31.1%) | 13570 (34.2%) | <0.001 |
| Overweight (>=25 to <30 kg/m2) | 11915 (39.9%) | 16263 (41%) | |
| Obese (>=30 kg/m2) | 6903 (23.1%) | 8071 (20.4%) | |
| Missing | 1738 (5.8%) | 1731 (4.4%) | |
| Total Energy Intake (kcal/day)b | |||
| Mean (SD) | 2011 (± 730.8) | 1920 (± 706.6) | <0.001 |
| Missing | 7475 (25%) | 14998 (37.8%) | |
a
1 serving is equivalent to 70.9 grams or 2.5 ounces.
b
Mean imputed for partially missing data. Studies with missing variable not used for mean estimation.