Table 1.
Descriptive statistics for the study population, alcohol- and narcotics-attributable hospitalization or death (ages 30–55), by person-years.
| Alcohol |
Narcotics |
|||||
|---|---|---|---|---|---|---|
| Person-years N (%) |
Events N (%) |
Incidence rate (95% CI) a | Person-years N (%) |
Events N (%) |
Incidence rate (95% CI) a | |
| Birth order | ||||||
| First | 1,334,223 (37.8) | 1850 (36.2) | 1.39 (1.32–1.45) | 1,347,990 (37.9) | 654 (31.0) | 0.49 (0.45–0.52) |
| Second | 1,332,621 (37.8) | 1843 (36.1) | 1.38 (1.32–1.45) | 1,343,749 (37.7) | 818 (38.8) | 0.61 (0.57–0.65) |
| Third | 607,649 (17.2) | 917 (17.9) | 1.51 (1.41–1.61) | 613,546 (17.2) | 434 (20.6) | 0.71 (0.64–0.78) |
| Fourth | 200,603 (5.7) | 385 (7.5) | 1.92 (1.74–2.12) | 203,144 (5.7) | 164 (7.8) | 0.81 (0.69–0.94) |
| Fifth | 50,540 (1.4) | 114 (2.2) | 2.26 (1.88–2.71) | 51,308 (1.4) | 40 (1.9) | 0.78 (0.57–1.06) |
| Sex | ||||||
| Male | 1,801,837 (51.1) | 3781 (74.0) | 2.10 (2.03–2.17) | 1,830,319 (51.4) | 1315 (62.3) | 0.72 (0.68–0.76) |
| Female | 1,723,799 (48.9) | 1328 (26.0) | 0.77 (0.73–0.81) | 1,729,418 (48.6) | 795 (37.7) | 0.46 (0.43–0.49) |
| Birth yearb | ||||||
| <1953 | 1,277,819 (36.2) | 1869 (36.6) | 1.46 (1.40–1.53) | 1,292,324 (36.3) | 633 (30.0) | 0.49 (0.45–0.53) |
| 1953 | 1,335,033 (37.9) | 1890 (37.0) | 1.42 (1.35–1.48) | 1,347,141 (37.8) | 817 (38.7) | 0.61 (0.57–0.65) |
| >1953 | 912,784 (25.9) | 1350 (26.4) | 1.48 (1.40–1.56) | 920,272 (25.9) | 660 (31.3) | 0.72 (0.66–0.77) |
| Sibling group size | ||||||
| Two | 1,452,910 (41.2) | 1791 (35.1) | 1.23 (1.18–1.29) | 1,463,902 (41.1) | 746 (35.4) | 0.51 (0.47–0.55) |
| Three | 1,217,875 (34.5) | 1770 (34.6) | 1.45 (1.39–1.52) | 1,229,801 (34.5) | 770 (36.5) | 0.63 (0.58–0.67) |
| Four | 599,469 (17.0) | 1026 (20.1) | 1.71 (1.61–1.82) | 606,433 (17.0) | 415 (19.7) | 0.68 (0.62–0.75) |
| Five | 255,382 (7.2) | 522 (10.2) | 2.04 (1.88–2.23) | 259,601 (7.3) | 179 (8.5) | 0.69 (0.60–0.80) |
| Mother's age at 1st birthc | ||||||
| <20 | 406,374 (11.5) | 892 (17.5) | 2.20 (2.06–2.34) | 412,404 (11.6) | 391 (18.5) | 0.95 (0.86–1.05) |
| 20-24 | 1,475,324 (41.8) | 2413 (47.2) | 1.64 (1.57–1.70) | 1,491,281 (41.9) | 1000 (47.4) | 0.67 (0.63–0.71) |
| 25-29 | 1,127,863 (32.0) | 1258 (24.6) | 1.12 (1.06–1.18) | 1,136,275 (31.9) | 508 (24.1) | 0.45 (0.41–0.49) |
| 30-34 | 417,127 (11.8) | 438 (8.6) | 1.05 (0.96–1.15) | 419,919 (11.8) | 166 (7.9) | 0.40 (0.34–0.46) |
| >34 | 98,949 (2.8) | 108 (2.1) | 1.09 (0.90–1.32) | 99,858 (2.8) | 45 (2.1) | 0.45 (0.34–0.60) |
| Total | 3,525,636 (100) | 5109 (100) | 1.45 (1.41–1.49) | 3,559,737 (100) | 2110 (100) | 0.59 (0.57–0.62) |
a
Incidence rates are calculated per 1000 person-years.
b
Included as individual year dummies in the analysis, but presented categorically here to illustrate the unique nature of the data material.
c
Included as individual year dummies in the analysis, but presented in age bands for descriptive purposes.