Selected risk factors for death related to respiratory tract infection among children born in Ontario, Scotland and England, Dec. 4, 2002, to Dec. 4, 2012
| Risk factor | No. (%) of births | ||
|---|---|---|---|
| Ontario n = 1 299 240 | Scotland n = 547 556 | England n = 3 910 401 | |
| Sex | |||
| Male | 667 246 (51.4) | 281 123 (51.3) | 2 004 857 (51.3) |
| Female | 631 994 (48.6) | 266 433 (48.7) | 1 905 544 (48.7) |
| Gestational age, wk | |||
| < 34 | 18 320 (1.4) | 8041 (1.5) | 56 759 (1.4) |
| 34–36 | 62 284 (4.8) | 22 235 (4.1) | 164 494 (4.2) |
| 37–38 | 339 699 (26.1) | 88 585 (16.2) | 722 741 (18.5) |
| 39–40 | 711 726 (54.8) | 271 895 (49.7) | 2 009 458 (51.4) |
| ≥ 41 | 166 832 (12.8) | 133 816 (24.4) | 956 949 (24.5) |
| Missing | 379 (0.03) | 22 984 (4.2) | 0 (0.0) |
| High-risk chronic condition before 1 yr | 66 693 (5.1) | 30 836 (5.6) | 357 034 (9.1) |
| High-risk chronic condition before 5 yr | 85 942 (6.6) | 47 240 (8.6) | 436 556 (11.2) |
| Maternal age, yr | |||
| < 19 | 27 357 (2.1) | 22 721 (4.1) | 139 427 (3.6) |
| 19–24 | 189 837 (14.6) | 113 598 (20.7) | 856 179 (21.9) |
| 25–29 | 359 657 (27.7) | 137 616 (25.1) | 1 058 040 (27.1) |
| 30–34 | 429 301 (33.0) | 148 481 (27.1) | 1 103 519 (28.2) |
| 35–39 | 217 388 (16.7) | 84 794 (15.5) | 613 693 (15.7) |
| ≥ 40 | 45 127 (3.5) | 17 651 (3.2) | 139 543 (3.6) |
| Missing | 30 573 (2.4) | 22 695 (4.1) | 0 (0.0) |
| Area-level deprivation quintile | |||
| 1st (least deprived) | 302 124 (23.2) | 98 661 (18.0) | 574 948 (14.7) |
| 2nd | 232 319 (17.9) | 96 337 (17.6) | 609 939 (15.6) |
| 3rd | 229 629 (17.7) | 109 705 (20.0) | 699 106 (17.9) |
| 4th | 230 381 (17.7) | 115 264 (21.0) | 855 442 (21.9) |
| 5th (most deprived) | 284 619 (21.9) | 127 589 (23.3) | 1 170 966 (29.9) |
| Missing | 20 168 (1.6) | 0 (0.0) | 0 (0.0) |