From: Systematic review of the evidence relating FEV1decline to giving up smoking
 |  | Stratifying variables |  |  | ||
---|---|---|---|---|---|---|
Study no. | Reference | Sex | Age | Otherb | Amount smoked (cigarettes/day)c | Beta (SE) |
4 | Burchfiel et al. [11] | M | 45-68 | - | 1-19, 20-29, 30-39, 40+ | 29.8 (3.5), 32.4 (2.0), 35.5 (2.8), 34.3 (2.7) |
12 | Ferris et al. [29] | M | 25-74 | - | 1-24, 25+ | 0.0 (5.7), 6.7 (5.8) |
 |  | F | 25-74 | - | 1-24, 25+ | 1.7 (4.4), 1.7 (8.3) |
13 | Fletcher et al. [6] | M | 30-59 | F1 | 1-5, 6-15, 16-25, 26+ | 45.0 (5.0), 55.0 (4.0), 74.0 (5.0), 63.0 (6.0) |
 |  | M | 30-59 | F2 | 1-5, 6-15, 16-25, 26+ | 37.0 (6.0), 49.0 (4.0), 51.0 (4.0), 45.0 (10.0) |
 |  | M | 30-59 | F3 | 1-5, 6-15, 16-25, 26+ | 39.0 (4.0), 39.0 (4.0), 38.0 (5.0), 52.0 (11.0) |
22 | Lange et al. [42] | M | 20-54 | - | 1-14, 15+ | 22.0 (6.0), 42.0 (5.0) |
 |  | M | 55+ | - | 1-14, 15+ | 52.0 (3.0), 56.0 (6.0) |
 |  | F | 20-54 | - | 1-14, 15+ | 17.0 (4.0), 30.0 (4.0) |
 |  | F | 55+ |  | 1-14, 15+ | 39.0 (3.0), 48.0 (5.0) |
29 | Xu et al. [54] | M | 25-34 | - | 1-14, 15-24, 25+ | 36.5, 20.6, 41.7 |
 |  | M | 35-44 | - | 1-14, 15-24, 25+ | 30.4, 40.3, 39.0 |
 |  | M | 45-54 | - | 1-14, 15-24, 25+ | 55.0, 57.4, 68.8 |
 |  | M | 55-64 | - | 1-14, 15-24, 25+ | 49.0, 53.8, 68.5 |
 |  | M | 65-78 | - | 1-14, 15-24, 25+ | 66.8, 54.1, 73.4 |
 |  | M | 25-74 | - | 1-14, 15-24, 25+ | 37.4 (6.0), 47.2 (3.6), 59.9 (3.5) |
 |  | F | 25-34 | - | 1-14, 15-24, 25+ | 16.5, 21.9, 28.0 |
 |  | F | 35-44 | - | 1-14, 15-24, 25+ | 28.9, 35.8, 36.9 |
 |  | F | 45-54 | - | 1-14, 15-24, 25+ | 32.5, 45.7, 37.8 |
 |  | F | 55-64 | - | 1-14, 15-24, 25+ | 42.7, 52.0, 50.4 |
 |  | F | 65-78 | - | 1-14, 15-24, 25+ | 29.4, 47.9, 37.4 |
 |  | F | 25-74 | - | 1-14, 15-24, 25+ | 31.2 (2.4), 42.0 (1.8), 38.9 (2.5) |
31 | Tashkin et al. [57] | M | 25-59 | - | 1-20, 21+ | 77.8 (6.2), 81.8 (5.0) |
 |  | F | 25-59 | - | 1-20, 21+ | 52.3 (3.3), 61.7 (3.7) |
32 | Xu et al. [4] | M | 25-54 | - | 1-14, 15-24, 25+ | 18.8 (5.3), 26.3 (4.2), 33.2 (4.9) |
 |  | F | 25-54 | - | 1-14, 15-24, 25+ | 15.0 (4.0), 20.4 (5.1), 30.1 (7.6) |