Table 2.
Participants’ characteristics across quartiles of dietary inflammatory index (DII) among 302 controls, Kingston, Ontario, Canada, 1997–1999.
| Characteristicsc | DII quartiles | ||||
|---|---|---|---|---|---|
| < −0.52 | −0.52,−0.20 | −0.21,0.68 | >0.68 | p-valuec | |
| Age (yr) a | 65.9±6.6 | 63.4±6.0 | 62.7±6.6 | 62.2±7.9 | 0.001 |
| Ethnicity | 0.12 | ||||
| British | 50 (68.5) | 52 (67.5) | 65 (80.2) | 45 (63.4) | |
| Others | 23 (31.5 | 25 (32.5) | 16 (19.8) | 26 (36.6) | |
| Education (years) | 0.01 | ||||
| ≤ High school | 34 (46.6) | 28 (36.4) | 39 (48.1) | 45 (63.4) | |
| > High school | 39 (53.4) | 49 (63.6) | 42 (51.9) | 26 (36.6) | |
| Income | 0.50 | ||||
| Lower | 38 (52.0) | 32 (41.6) | 41 (50.6) | 37 (52.1) | |
| Higher | 35 (48.0) | 45 (58.4) | 40 (49.4) | 34 (47.9) | |
| Body mass index (kg/m2)a | 25.1±3.4 | 24.3±2.5 | 24.7±2.6 | 25.2±3.3 | 0.65 |
| Smoking | 0.26 | ||||
| Ever smoker | 25 (34.2) | 28 (36.7) | 28 (34.6) | 16 (22.5) | |
| Non smoker | 48 (65.8) | 49 (63.6) | 53 (65.4) | 55 (77.5) | |
| Family history of prostate cancerb | 0.24 | ||||
| No | 50 (68.5) | 62 (80.5) | 65 (80.2) | 52 (73.2) | |
| Yes | 23 (31.5) | 15 (19.5) | 16 (19.8) | 19 (26.8) | |
| Physical Activity as a teenager | 0.06 | ||||
| Low | 28 (38.4) | 30 (39.0) | 29 (35.8) | 26 (36.6) | |
| Moderate | 25 (34.2) | 38 (49.3) | 43 (53.1) | 30 (43.3) | |
| Strenuous | 18 (24.7) | 8 (10.4) | 8 (9.9) | 10 (14.1) | |
a
Mean± standard deviation.
b
In first-degree relatives.
c
t test for continuous variables and chi-square test for categorical variables.