Table 5.
No of deaths from all causes and death rate ratios among former smokers by sex, year of birth, and age at quitting smoking
| Men | Women | Men and women | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean age when quit (years) | No of deaths | Rate ratio (95% CI) v never smokers* | Mean age when quit (years) | No of deaths | Rate ratio (95% CI) v never smokers* | No of deaths | Rate ratio (95% CI) v never smokers* | |||
| Born before 1920 | ||||||||||
| Former smokers: | ||||||||||
| Age quit smoking (years): | ||||||||||
| <25 | 22 | 32 | 1.19 (0.84 to 1.68) | 21 | 3 | 0.89 (0.29 to 2.75) | 35 | 1.13 (0.81 to 1.58) | ||
| 25-34 | 30 | 125 | 1.13 (0.94 to 1.36) | 30 | 30 | 1.16 (0.81 to 1.65) | 155 | 1.12 (0.95 to 1.31) | ||
| 35-44 | 40 | 253 | 1.09 (0.95 to 1.24) | 40 | 56 | 1.04 (0.80 to 1.36) | 309 | 1.06 (0.94 to 1.19) | ||
| 45-54 | 50 | 540 | 1.11 (1.00 to 1.22) | 50 | 123 | 0.93 (0.78 to 1.11) | 663 | 1.05 (0.97 to 1.15) | ||
| 55-64 | 59 | 732 | 1.23 (1.12 to 1.34) | 60 | 200 | 1.22 (1.06 to 1.40) | 932 | 1.21 (1.12 to 1.30) | ||
| ≥65 | 71 | 700 | 1.45 (1.33 to 1.59) | 72 | 250 | 1.31 (1.15 to 1.48) | 950 | 1.39 (1.29 to 1.49) | ||
| P value for trend | 0.000003 | 0.01 | <0.00001 | |||||||
| Unknown age | 161 | 1.51 (1.28 to 1.78) | 220 | 1.45 (1.27 to 1.66) | 381 | 1.47 (1.32 to 1.62) | ||||
| Current smokers | — | 7023 | 1.45 (1.37 to 1.53) | — | 1947 | 1.50 (1.43 to 1.58) | 8970 | 1.47 (1.41 to 1.52) | ||
| Never smokers | — | 1592 | — | — | 10 595 | — | 12 187 | — | ||
| Born 1920-45 | ||||||||||
| Former smokers: | ||||||||||
| Age quit smoking (years): | ||||||||||
| <25 | 22 | 20 | 0.91 (0.58 to 1.42) | 22 | 5 | 1.54 (0.64 to 3.70) | 25 | 0.98 (0.66 to 1.46) | ||
| 25-34 | 30 | 85 | 0.83 (0.66 to 1.05) | 29 | 24 | 1.21 (0.81 to 1.81) | 109 | 0.89 (0.73 to 1.09) | ||
| 35-44 | 39 | 200 | 1.21 (1.02 to 1.44) | 39 | 46 | 1.27 (0.95 to 1.70) | 246 | 1.22 (1.06 to 1.40) | ||
| 45-54 | 49 | 273 | 1.43 (1.23 to 1.68) | 49 | 74 | 1.59 (1.26 to 2.00) | 347 | 1.46 (1.29 to 1.65) | ||
| 55-64 | 58 | 206 | 1.73 (1.45 to 2.06) | 59 | 61 | 1.49 (1.15 to 1.92) | 267 | 1.65 (1.44 to 1.90) | ||
| ≥65 | 67 | 29 | 1.72 (1.16 to 2.57) | 67 | 14 | 1.94 (1.15 to 3.29) | 43 | 1.78 (1.30 to 2.45) | ||
| P value for trend | <0.00001 | 0.09 | <0.00001 | |||||||
| Unknown age | 90 | 2.14 (1.70 to 2.69) | 74 | 1.55 (1.23 to 1.95) | 164 | 1.82 (1.56 to 2.14) | ||||
| Current smokers | — | 3089 | 1.89 (1.70 to 2.09) | — | 731 | 1.81 (1.67 to 1.96) | 3820 | 1.84 (1.74 to 1.96) | ||
| Never smokers | — | 404 | — | — | 3755 | — | 4159 | — | ||
*Death rate ratios stratified for age, calendar period, and (when men and women combined) sex.