Table 2. Sociodemographic correlates of 1-year MDE by agea.
| Age group (yr) | Gender |
Education |
Marital status |
Income |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Female | Male | Low | Low-average | High-average | High | Married | Separated, widowed or divorced | Never married | Low | Low-average | High-average | High | ||
| 18-34 | n in each category | 610 | 599 | 4 | 36 | 158 | 181 | 460 | 9 | 740 | 70 | 119 | 98 | 92 |
| n with MDE | 13 | 12 | 0 | 5 | 10 | 10 | 11 | 2 | 12 | 3 | 13 | 4 | 5 | |
| % (s.e.)b | 2.1 (0.7) | 2.7 (1.0) | 0.0 (0.0) | 11.9 (5.6) | 9.3 (3.1) | 5.0 (1.7) | 2.7 (1.0) | - | 1.8 (0.7) | - | 3.6 (1.5) | - | 1.2 (0.6) | |
| OR (CI)c | 0.8 (0.3-2.2) | 1.0 | - | 2.6 (0.7-9.7) | 1.8 (0.8-4.6) | 1.0 | 1.0 | - | 0.7 (0.2-2.0) | - | 3.1 (0.8-12.5) | - | 1.0 | |
| χ2(1)=0.2 | χ2(2)=3.3 | χ2(2)=11.1* | χ2(3)=6.6 | |||||||||||
| (p=0.62) | (p=0.19) | (p<0.01) | (p=0.09) | |||||||||||
| 35-49 | n in each category | 1136 | 1125 | 18 | 223 | 332 | 153 | 2064 | 122 | 75 | 136 | 173 | 278 | 139 |
| n with MDE | 16 | 25 | 1 | 16 | 17 | 7 | 34 | 5 | 2 | 14 | 9 | 10 | 8 | |
| % (s.e.)b | 1.2 (0.4) | 1.9 (0.4) | - | 6.7 (2.0) | 5.2 (1.5) | 4.7 (2.4) | 1.4 (0.2) | 4.4 (2.1) | - | 2.7 (0.8) | 2.1 (1.0) | 1.4 (0.6) | 1.4 (0.6) | |
| OR (CI)c | 0.6 (0.3-1.3) | 1.0 | - | 1.5 (0.4-5.3) | 1.1 (0.3-3.8) | 1.0 | 1.0 | 3.1* (1.2-7.8) | - | 2.0 (0.7-5.6) | 1.5 (0.4-5.4) | 1.0 (0.2-4.1) | 1.0 | |
| χ2(1)=1.8 | χ2(3)=0.5 | χ2(2)=6.3* | χ2(3)=2.6 | |||||||||||
| (p=0.18) | (p=0.93) | (p=0.04) | (p=0.46) | |||||||||||
| 50-64 | n in each category | 617 | 567 | 54 | 134 | 78 | 91 | 1054 | 104 | 26 | 28 | 97 | 148 | 84 |
| n with MDE | 9 | 8 | 2 | 5 | 7 | 3 | 14 | 3 | 0 | 1 | 6 | 6 | 4 | |
| % (s.e.)b | 1.6 (0.7) | 1.6 (0.4) | - | 2.2 (1.0) | 13.0 (3.9) | - | 1.5 (0.4) | 3.2 (1.9) | - | - | 6.1 (3.8) | 1.7 (0.7) | - | |
| OR (CI)c | 1.0 (0.4-2.7) | 1.0 | - | 0.6 (0.1-2.5) | 3.6 (0.9-14.2) | - | 1.0 | - | - | - | 3.9 (0.7-22.2) | 1.0 (0.3-4.0) | - | |
| χ2(1)=0 | χ2(3)=17.0* | χ2(1)=1.4 | χ2(3)=5.6 | |||||||||||
| (p=0.93) | (p<0.01) | (p=0.23) | (p=0.13) | |||||||||||
| ≥65 | n in each category | 305 | 242 | 92 | 32 | 19 | 23 | 457 | 83 | 7 | 13 | 44 | 64 | 45 |
| n with MDE | 5 | 1 | 5 | 1 | 0 | 0 | 3 | 3 | 0 | 2 | 1 | 2 | 1 | |
| % (s.e.)b | 1.1 (0.5) | - | 4.9 (2.6) | - | - | - | - | - | - | - | - | - | - | |
| OR (CI)c | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| All ages | n in each category | 2668 | 2533 | 168 | 425 | 587 | 448 | 4035 | 318 | 848 | 247 | 433 | 588 | 360 |
| n with MDE | 43 | 46 | 8 | 27 | 34 | 20 | 62 | 13 | 14 | 20 | 29 | 22 | 18 | |
| % (s.e.)b | 1.6 (0.3) | 2.1 (0.5) | 6.4 (2.5) | 6.2 (1.4) | 7.7 (1.9) | 4.6 (1.2) | 1.6 (0.3) | 6.0 (2.1) | 1.8 (0.7) | 2.3 (0.6) | 3.3 (1.0) | 1.2 (0.3) | 1.3 (0.3) | |
| OR (CI)c | 0.8 (0.4-1.3) | 1.0 | 1.4 (0.5-4.1) | 1.4 (0.7-2.7) | 1.7 (0.9-3.3) | 1.0 | 1.0 | 3.9* (1.8-8.8) | 1.1 (0.5-2.6) | 1.8 (0.9-3.5) | 2.6* (1.1-6.3) | 0.9 (0.4-2.1) | 1.0 | |
| χ2(1)=1.0 | χ2(3)=2.9 | χ2(2)=11.9* | χ2(3)=8.8* | |||||||||||
| (p=0.33) | (p=0.41) | (p<0.01) | (p=0.03) | |||||||||||
| Test for difference in prevalence among respondents with MDE across the age groupsd | χ2(3)=1.4 | χ2(3)=2.4 | χ2(2)=0.7 | χ2(3)=11.8* | χ2(2)=6.4* | χ2(2)=0.2 | χ2(3)=11.0* | χ2(3)=10.5 | χ2(1)=0 | χ2(3)=4.3 | χ2(3)=3.6 | χ2(3)=2.6 | χ2(3)=0.8 | |
| (p=0.70) | (p=0.49) | (p=0.72) | (p=0.01) | (p=0.04) | (p=0.92) | (p=0.01) | (p=0.02) | (p=0.95) | (p=0.24) | (p=0.30) | (p=0.46) | (p=0.84) | ||
| Test for difference in ORs across the age groupse | χ2(6)=4.6 | χ2(9)=29.3* | χ2(7)=25.5* | χ2(12)=12.3 | ||||||||||
| (p=0.60) | (p<0.01) | (p<0.01) | (p=0.42) | |||||||||||
MDE, Major depressive episode; s.e., standard error; OR, odds ratio; CI, confidence interval; -, low cell size.
Bivariate model; each demographic in separate models.
Percentage of people with MDE in each category.
ORs are estimating the likelihood of 12-month MDE with each demographic variable as predictors; ORs are not presented for the cells where the count of respondents within the demographic category is <15, or the count of respondents with MDE is <5.
Significance tests across cohorts with corresponding predictor categories for difference in prevalence, controlling for the same demographics. No n restriction for tests across cohorts; results for rows with multiple small cells may be unstable.
Significance tests of interaction between cohorts and corresponding predictor categories for difference in OR, controlling for the same demographics. No n restriction for tests across cohorts; results for rows with multiple small cells may be unstable.
Significant (p<0.05).