Table 9.
Level of smoking in spouse and deaths from coronary heart disease among never smokers in California cancer prevention study (CPS I) cohort, as of 1959, 1965, and 1972
|
1960-5
|
1966-72
|
1973-85
|
||||
|---|---|---|---|---|---|---|
| Smoking in spouse | No of deaths/No of participants | Age adjusted relative risk (95% CI) | No of deaths/No of participants | Age adjusted relative risk (95% CI) | No of deaths/No of participants | Age adjusted relative risk (95% CI) |
| Males * | ||||||
| Never | 224/7458 | 1.00 | 304/6762 | 1.00 | 769/5300 | 1.00 |
| Former | 7/624 | 0.64 (0.30 to 1.35) | 19/581 | 1.07 (0.67 to 1.71) | 47/490 | 0.95 (0.71 to 1.28) |
| Current | 30/1537 | 1.07 (0.72 to 1.57) | 36/1429 | 0.85 (0.60 to 1.20) | 120/1185 | 0.97 (0.80 to 1.18) |
| Ever | 37/2161 | 0.94 (0.66 to 1.34) | 55/2010 | 0.91 (0.68 to 1.21) | 167/1675 | 0.97 (0.82 to 1.15) |
| 7 level index † | 261/9619 | 1.02 (0.91 to 1.15) | 359/8772 | 0.95 (0.86 to 1.05) | 936/6975 | 1.01 (0.95 to 1.06) |
| Females * | ||||||
| Never | 49/7399 | 1.00 | 124/7008 | 1.00 | 408/5343 | 1.00 |
| Former | 63/6858 | 1.26 (0.87 to 1.84) | 102/6432 | 0.83 (0.64 to 1.08) | 410/4896 | 1.01 (0.88 to 1.15) |
| Current | 61/11685 | 1.10 (0.75 to 1.62) | 141/11002 | 0.87 (0.68 to 1.11) | 565/8433 | 1.02 (0.90 to 1.16) |
| Ever | 124/18543 | 1.16 (0.83 to 1.61) | 243/17434 | 0.85 (0.68 to 1.06) | 975/13323 | 1.02 (0.90 to 1.14) |
| 8 level index † | 173/25942 | 1.01 (0.93 to 1.10) | 367/24442 | 0.98 (0.92 to 1.03) | 1393/18666 | 1.00 (0.98 to 1.03) |
| Males ‡ | ||||||
| Never | 271/6173 | 1.00 | 453/3404 | 1.00 | ||
| Former | 20/726 | 0.87 (0.55 to 1.37) | 56/573 | 0.93 (0.70 to 1.23) | ||
| Current | 26/1053 | 0.79 (0.53 to 1.19) | 48/525 | 1.00 (0.74 to 1.35) | ||
| Ever | 46/1779 | 0.82 (0.60 to 1.13) | 104/1098 | 0.96 (0.77 to 1.20) | ||
| 7 level index † | 317/8265 | 0.97 (0.87 to 1.08) | 557/4502 | 1.00 (0.93 to 1.09) | ||
| Undefined after 1959 | 42/726 | 379/2473 | ||||
| Females ‡ | ||||||
| Never | 92/6138 | 1.00 | 180/3090 | 1.00 | ||
| Former | 112/9042 | 0.81 (0.62 to 1.07) | 287/5079 | 0.92 (0.76 to 1.11) | ||
| Current | 62/5660 | 0.98 (0.70 to 1.36) | 81/1783 | 1.02 (0.78 to 1.33) | ||
| Ever | 174/14702 | 0.86 (0.67 to 1.11) | 368/6862 | 0.94 (0.79 to 1.13) | ||
| 8 level index † | 266/20840 | 1.00 (0.94 to 1.07) | 548/9952 | 1.03 (0.97 to 1.09) | ||
| Undefined after 1959 | 101/3602 | 845/8714 | ||||
*
Smoking in spouse defined by 1959 questionnaire.
†
Index of environmental tobacco smoke based on seven or eight levels of smoking in spouse.
‡
Smoking in spouse defined by 1965 questionnaire for 1966-72 and by 1972 questionnaire for 1973-85.