Table 1 |
|||
Basic characteristic of study participants | |||
Colorectal cancer cases | Controls | p | |
[n = 703] | [n = 853] | ||
Gender [n, (%)] | |||
Males | 398 (56.6%) | 439 (51.5%) | df = 1 |
Females | 305 (43.4%) | 414 (48.5%) | p^{chi} = 0.043 |
Age | |||
Mean, (SD) | 57.9 (9.1) | 54.8 (11.5) | |
Median (Q1-Q3) | 59 (52–65) | 56 (47–64) | p^{MW} < 0.001 |
Education [n, (%)] | n = 701 | n = 852 | |
Primary school or less | 106 (15.1%) | 126 (14.8%) | df = 3 |
Vocational school | 185 (26.4%) | 236 (27.7%) | p^{chi} = 0.947 |
Secondary/high school | 250 (35.7%) | 296 (34.7%) | |
University or higher | 160 (22.8%) | 194 (22.8%) | |
Recreational physical activity* [METs-h/week] | |||
Mean, (SD) | 17.3 (16.0) | 17.0 (15.4) | p^{MW} = 0.968 |
Median (Q1-Q3) | 12.9 (5.6-24.5) | 13.0 (5.8-24.4) | |
BMI/body mass index [kg/m^{2}] | n = 702 | n = 846 | |
Mean, (SD) | 27.3 (4.1) | 27.2 (4.6) | p^{MW} = 0.411 |
Median (Q1-Q3) | 26.9 (24.4-29.7) | 26.7 (24.1-29.8) | |
Smoking | n = 852 | ||
Current smoker | 309 (43.9%) | 379 (44.5%) | df = 2 |
Ex-smoker | 179 (25.5%) | 267 (31.3%) | p^{chi} = 0.005 |
Non-smoker | 215 (30.6%) | 206 (24.2%) |
chi-chi-square test; df degrees of freedom, MW Mann–Whitney test.
* -adult lifetime recreational physical activity, i.e. the average for the period 18-current age (if current age <66) or for the period 18–65 (if current age >65).
Galas et al.
Galas et al. Nutrition Journal 2013 12:134 doi:10.1186/1475-2891-12-134