Table 3 Distribution of patients and events according to different categorizations of the primary independent variable
Frequency of sleep disturbances within 4 weeks prior to AMI | Men (n = 2511) | Women (n = 828) | |||
|---|---|---|---|---|---|
No. per category (%) | No. of deaths | No. per category (%) | No. of deaths | ||
Original response | never | 1699 (67.7) | 206 | 427 (51.6) | 71 |
< 1 per week | 247 (9.8) | 40 | 82 (9.9) | 14 | |
once per week | 67 (2.7) | 10 | 31 (3.7) | 7 | |
> 1 per week | 257 (10.2) | 37 | 138 (16.7) | 16 | |
nightly | 241 (9.6) | 25 | 150 (18.1) | 23 | |
Categorization 1 | never | 1699 (67.7) | 206 | 427 (516) | 71 |
sometimes | 571 (22.7) | 87 | 251 (30.3) | 37 | |
nightly | 241 (9.6) | 25 | 150 (18.1) | 23 | |
Categorization 2 | never | 1699 (67.7) | 206 | 427 (51.6) | 71 |
occasionally | 314 (12.5) | 50 | 113 (13.7) | 21 | |
frequently | 498 (19.8) | 62 | 288 (34.8) | 39 | |
Binary (any time) | no | 1699 (67.7) | 206 | 427 (51.6) | 71 |
yes | 812 (32.3) | 112 | 401 (48.4) | 60 | |