Table 1.
Sociodemographic status.
| No Insomnia (n = 20,400) |
All Insomnia (n = 8,755) |
Onset Insomnia (n = 2,051) |
Maintenance Insomnia (n = 4,333) |
All Insomnia vs. Ctrl |
Onset vs Ctrl | Maintenance vs Ctrl | Onset vs Maintenance | |
|---|---|---|---|---|---|---|---|---|
| n (%) or Mean ± SD | ORAge&Sex_Adjusted [95% CI] | |||||||
| Sex, female | 9,708 (47.6) | 5,109 (58.4) | 1,280 (62.4) | 2,273 (52.5) | 1.54 [1.46, 1.62] | 1.83 [1.66, 2.01] | 1.21 [1.14, 1.29] | 1.51 [1.35, 1.68] |
| Age, y | 63.0 ± 10.2 | 62.6 ± 10.2 | 62.6 ± 10.3 | 62.5 ± 10.2 | 1.00 [0.99, 1.00] | 1.00 [0.99, 1.00] | 1.00 [0.99, 1.00] | 1.00 [1.00, 1.01] |
| Body mass index, kg/m2 | 28.0 ± 5.3 | 28.2 ± 5.7 | 28.5 ± 5.7 | 27.9 ± 5.5 | 1.008 [1.004, 1.012] | 1.02 [1.01, 1.03] | 1.00 [0.99, 1.01] | 1.02 [1.01, 1.03] |
| Ethnicity, Caucasian | 19,486 (96.1) | 8,399 (96.7) | 1,946 (95.7) | 4,188 (97.3) | 1.16 [1.01, 1.33] | 0.86 [0.69, 1.09] | 1.43 [1.18, 1.75] | 0.61 [0.46, 0.81] |
| Married/common law | 15,317 (79.3) | 6,284 (76.9) | 1,405 (74.0) | 3,296 (80.6) | 0.92 [0.87, 0.98] | 0.81 [0.72, 0.90] | 1.13 [1.04, 1.23] | 0.71 [0.62, 0.80] |
| Annual income (per 1,000 CAD) | 59.2 ± 35.7 | 53.3 ± 35.3 | 48.5 ± 33.5 | 58.9 ± 36.3 | 0.9963 [0.9955, 0.9971] | 0.992 [0.991, 0.994] | 1.000 [0.999, 1.001] | 0.992 [0.991, 0.994] |
| Years of education | 13.7 ± 2.3 | 13.4 ± 2.3 | 13.2 ± 2.3 | 13.6 ± 2.3 | 0.94 [0.93, 0.95] | 0.92 [0.90, 0.94] | 0.98 [0.97, 0.99] | 0.94 [0.92, 0.96] |
| Employment status and work schedule | ||||||||
| Retired | 11,239 (55.3) | 4,855 (55.6) | 1,182 (57.9) | 2,333 (54.0) | 1.11 [1.04, 1.19] | 1.30 [1.14, 1.47] | 1.03 [0.94, 1.12] | 1.26 [1.09, 1.45] |
| Daytime job | 18,758 (92.6) | 8,005 (92.2) | 1,848 (91.5) | 4,021 (93.2) | - | - | - | - |
| Non-daytime job | 1,494 (7.4) | 680 (7.8) | 171 (8.5) | 292 (6.8) | 1.06 [0.96, 1.16] | 1.16 [0.98, 1.37] | 0.89 [0.77, 1.01] | 1.31 [1.07, 1.61] |
CAD = Canadian dollars, CI = confidence interval, Ctrl = control, OR = odds ratio, SD = standard deviation.