Table 4.
Percentage of cohort exposed to three measures of environmental tobacco smoke in 1999 by smoking status of spouse among 1959 never smokers who responded to 1999 follow up questionnaire. Subgroup of 1959 never smokers aged ≥50 years at entry (born before 1910) also shown. Values are percentage (number) exposed to environmental tobacco smoke in 1999, except for data on marital status
|
Regular exposure to cigarette smoke from others in work or daily life
|
Married only once as of 1999
|
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|---|---|---|---|---|---|---|---|
| Smoking status of spouse in 1959 | Lived with smoker | Lived with smoking spouse | None | Light | Moderate or heavy | Current | Ever |
| 1959 male never smokers | |||||||
| Never (n=496) | 24.0 (115) | 3.8 (18) | 43.5 (189) | 34.5 (150) | 22.1 (96) | 66.2 (319) | 82.2 (398) |
| Former (n=59) | 53.5 (31) | 27.6 (16) | 20.8 (11) | 43.4 (23) | 35.9 (19) | 62.5 (35) | 78.6 (44) |
| Current (n=124) | 89.5 (111) | 75.0 (93) | 23.1 (27) | 38.5 (45) | 38.5 (45) | 45.1 (55) | 70.5 (86) |
| 1959 female never smokers | |||||||
| Never (n=788) | 32.5 (253) | 3.7 (29) | 61.7 (398) | 24.3 (157) | 14.0 (90) | 39.5 (306) | 89.2 (686) |
| Former (n=573) | 73.6 (421) | 55.2 (316) | 41.3 (196) | 26.5 (126) | 32.2 (153) | 32.6 (187) | 84.0 (474) |
| Current: | |||||||
| Pipe or cigar (n=252) | 84.7 (211) | 69.9 (174) | 34.0 (73) | 30.2 (65) | 35.8 (77) | 30.1 (75) | 82.2 (198) |
| 1-19 cigarettes/day (n=233) | 93.0 (212) | 83.3 (190) | 25.5 (53) | 28.8 (60) | 45.7 (95) | 22.0 (50) | 80.4 (180) |
| 20-39 cigarettes/day (n=479) | 98.7 (467) | 91.1 (431) | 19.7 (84) | 20.9 (89) | 59.4 (253) | 16.4 (78) | 78.5 (365) |
| ≥40 cigarettes/day (n=87) | 98.8 (84) | 83.5 (71) | 16.2 (13) | 12.5 (10) | 71.3 (57) | 14.8 (13) | 73.9 (65) |
| Total of current smokers (1051) | 94.1 (974) | 83.7 (866) | 24.0 (223) | 24.1 (224) | 51.9 (482) | 20.8 (216) | 79.4 (808) |
| 1959 male never smokers aged ≥50 years at enrolment | |||||||
| Never (n=94) | 11.5 (10) | 2.3 (2) | 58.2 (46) | 24.1 (19) | 17.7 (12) | 47.8 (43) | 80.0 (72) |
| Former (n=11) | 36.4 (4) | 18.2 (2) | 50.0 (5) | 20.0 (2) | 30.0 (3) | 45.5 (5) | 90.9 (10) |
| Current (n=17) | 88.2 (15) | 70.6 (12) | 18.8 (3) | 43.7 (7) | 37.5 (6) | 12.5 (2) | 56.3 (9) |
| 1959 female never smokers aged ≥50 years at enrolment | |||||||
| Never (n=100) | 26.0 (26) | 4.0 (4) | 71.2 (52) | 21.9 (16) | 6.9 (5) | 16.3 (16) | 92.7 (89) |
| Former (n=99) | 83.0 (78) | 68.1 (64) | 40.7 (33) | 24.7 (20) | 34.6 (28) | 17.2 (17) | 80.4 (78) |
| Current: | |||||||
| Pipe or cigar (n=43) | 71.4 (30) | 59.5 (25) | 42.5 (14) | 24.2 (8) | 33.3 (11) | 14.0 (6) | 77.8 (28) |
| 1-19 cigarettes/day (n=29) | 96.3 (26) | 85.2 (23) | 20.0 (5) | 28.0 (7) | 52.0 (13) | 6.9 (2) | 84.6 (22) |
| 20-39 cigarettes/day (n=75) | 97.1 (72) | 87.7 (67) | 14.8 (7) | 21.9 (13) | 63.3 (43) | 7.9 (6) | 81.7 (58) |
| ≥40 cigarettes/day (n=9) | 100.0 (8) | 75.0 (6) | 0 | 0 | 100.0 (7) | 11.1 (1) | 88.9 (8) |
| Total of current smokers (n=156) | 90.7 (136) | 80.7 (121) | 20.3 (26) | 21.9 (28) | 57.8 (74) | 9.6 (15) | 81.7 (116) |
Some values do not agree with denominators due primarily to missing data.