Table 1:
Distribution of myocardial infarctions the day after a snowfall and according to patient characteristics
| Variable | No. (%) of hospital admissions n = 128 073 |
No. (%) of deaths n = 68 155 |
|---|---|---|
| Quantity of snow, cm | ||
| 0 | 84 271 (65.8) | 44 547 (65.4) |
| 1–4 | 32 234 (25.2) | 17 041 (25.0) |
| 5–9 | 6556 (5.1) | 3793 (5.6) |
| 10–19 | 3801 (3.0) | 2199 (3.2) |
| ≥ 20 | 1211 (0.9) | 575 (0.8) |
| Duration of snow, h | ||
| 0 | 51 838 (40.5) | 23 394 (34.3) |
| 1–2 | 9995 (7.8) | 4651 (6.8) |
| 3–5 | 10 623 (8.3) | 5175 (7.6) |
| 6–11 | 15 188 (11.9) | 7693 (11.3) |
| ≥ 12 | 14 031 (11.0) | 7052 (10.3) |
| Not available | 26 398 (20.6) | 20 190 (29.6) |
| Sex | ||
| Men | 79 150 (61.8) | 39 106 (57.4) |
| Women | 48 923 (38.2) | 29 049 (42.6) |
| Age, yr | ||
| < 55 | 22 247 (17.4) | 5546 (8.1) |
| 55–64 | 24 031 (18.8) | 10 044 (14.7) |
| 65–74 | 31 838 (24.9) | 18 102 (26.6) |
| ≥ 75 | 49 957 (39.0) | 34 463 (50.6) |
| Cardiovascular comorbidity* | 101 254 (79.1) | 7103 (46.2) |
| Cardiovascular risk factor† | 89 491 (69.9) | 3340 (21.7) |
| Material deprivation‡ | ||
| Wealthy | 44 255 (34.6) | 14 401 (34.6) |
| Middle income | 37 062 (28.9) | 11 261 (27.0) |
| Poor | 32 946 (25.7) | 10 503 (25.2) |
| Period | ||
| 1981–1988 | – | 26 503 (38.9) |
| 1989–1998 | 61 915 (48.3) | 24 686 (36.2) |
| 1999–2008 | 46 293 (36.1) | 12 812 (18.8) |
| 2009–2014 | 19 865 (15.5) | 4154 (6.1) |
*
Includes heart, cerebrovascular, arterial, other cardiovascular disease. Data on deaths are for 15 381 deaths from 2000 onward.
†
Includes hypertension, diabetes, obesity, dyslipidemia, smoking/chronic obstructive pulmonary disease. Data on deaths are for 15 381 deaths from 2000 onward.
‡
Data on deaths are for 41 652 deaths from 1989 onward.