Table 1.
Baseline characteristics in the Melbourne Collaborative Cohort Study, 1990–1994
| N | Non-cases N (%) |
Cases N (%) |
||
|---|---|---|---|---|
| 34900 | 403 | |||
| Age group | ||||
| <50 years | 12,072 | (34.6) | 42 | (10.4) |
| 50–59 years | 11,553 | (33.1) | 135 | (33.5) |
| ≥60 years | 11,275 | (32.3) | 226 | (56.1) |
| Country of birth | ||||
| Australia/New Zealand | 24,240 | (69.5) | 249 | (61.8) |
| UK | 2,576 | (7.4) | 38 | (9.4) |
| Italy | 4,402 | (12.6) | 72 | (17.9) |
| Greece | 3,682 | (10.6) | 44 | (10.9) |
| Education | ||||
| ≤Primary school | 6,394 | (18.3) | 97 | (24.1) |
| Some high/technical school | 13,255 | (38.0) | 174 | (43.2) |
| Completed high/technical school | 7,226 | (20.7) | 84 | (20.8) |
| Degree/diploma | 8,025 | (23.0) | 48 | (11.9) |
| SEIFAa quintiles | ||||
| Q1 (most disadvantaged) | 4,889 | (14.0) | 75 | (18.6) |
| Q2 | 7,110 | (20.4) | 95 | (23.6) |
| Q3 | 6,428 | (18.4) | 76 | (18.9) |
| Q4 | 7,249 | (20.8) | 77 | (19.1) |
| Q5 (least disadvantaged) | 9,224 | (26.4) | 80 | (19.9) |
| DIIb quartiles | ||||
| Q1 (anti-inflammatory) | 8,740 | (25.0) | 85 | (21.1) |
| Q2 | 8,745 | (25.1) | 81 | (20.1) |
| Q3 | 8,736 | (25.0) | 91 | (22.6) |
| Q4 (pro-inflammatory) | 8,679 | (24.9) | 146 | (36.2) |
| MDSc categories | ||||
| 0–3 | 7,507 | (21.5) | 126 | (31.3) |
| 4–6 | 22,013 | (63.1) | 229 | (56.8) |
| 7–9 | 5,380 | (15.4) | 48 | (11.9) |
| Alcohol intake | ||||
| Lifetime abstainers | 9,832 | (28.2) | 68 | (16.9) |
| Ex-drinkers | 1,239 | (3.6) | 21 | (5.2) |
| Low intake | 19,241 | (55.1) | 218 | (54.1) |
| Medium intake | 3,084 | (8.8) | 56 | (13.9) |
| High intake | 1,504 | (4.3) | 40 | (9.9) |
| Physical activityd | ||||
| 0 (none) | 7,699 | (22.1) | 98 | (24.3) |
| >0 to < 4 (low) | 7,041 | (20.2) | 100 | (24.8) |
| ≥4 to < 6 (moderate) | 12,141 | (34.8) | 139 | (34.5) |
| ≥6 (high) | 8,019 | (23.0) | 66 | (16.4) |
| BMI category | ||||
| <25 kg/m2 | 13,058 | (37.4) | 155 | (38.5) |
| 25–<30 kg/m2 | 14,992 | (43.0) | 177 | (43.9) |
| ≥30 kg/m2 | 6,850 | (19.6) | 71 | (17.6) |
| Smoking status | ||||
| Never | 20,810 | (59.6) | 63 | (15.6) |
| Current | 3769 | (10.8) | 175 | (43.4) |
| Former | 10,321 | (29.6) | 165 | (40.9) |
| Pack-years (current and former smokers) | ||||
| >0 to <10 pack-years | 4,647 | (33.0) | 26 | (7.6) |
| 10 to <20 pack-years | 2,927 | (20.8) | 28 | (8.2) |
| 20 to <30 pack-years | 2,107 | (15.0) | 50 | (14.7) |
| ≥30 pack-years | 4,409 | (31.3) | 236 | (69.4) |
| Years since quitting smoking (former | smokers) | |||
| <5 years | 1,786 | (17.3) | 55 | (33.3) |
| 5 to <10 years | 1,825 | (17.7) | 33 | (20.0) |
| ≥10 years | 6,710 | (65.0) | 77 | (46.7) |
| Sex | ||||
| Male | 13,821 | (39.6) | 245 | (60.8) |
| Female | 21,079 | (60.4) | 158 | (39.2) |
| Anti-inflammatory medication use | ||||
| No | 27,396 | (78.5) | 316 | (78.4) |
| Yes | 7,504 | (21.5) | 87 | (21.6) |
a
Socio-Economic Indexes for Areas Index of Relative Socio-Economic Disadvantage
b
Dietary Inflammatory Index
c
Mediterranean Diet Score
d
Ordinal score based on frequency of walking plus frequency of less vigorous activity plus twice the frequency of vigorous activity, and ranging from 0 to 16