Table 3 Age specific prevalence of different types of smoking among adults aged 15–50, Tehran, 2013–2015
Variables | Study population N (%) | < 30 years | 30–50 years |
|---|---|---|---|
Waterpipe Smoking | |||
Never | 803 (76.10) | 337 (69.77) | 466 (10.5) |
Lifetime | 252 (23.90) | 147 (30.63) | 105 (18.39) |
Current | 176 (16.60) | 120 (24.64) | 56 (9.81) |
Past | 76 (7.20) | 27 (5.59) | 49 (8.58) |
Age at first waterpipe Smoking | 20.30 (5.65) | 17.91 (3,71) | 23.62 (6.30) |
Waterpipe Smoking – duration (years) | |||
≤ 5 | 109 (10.35) | 80 (73.040) | 29 (26.60) |
> 5 | 143 (13.55) | 67 (46.85) | 76 (53.15) |
Waterpipe Smoking – cumulative amount (pipes) | |||
≤ 250 | 121 (11.5) | 68 (56.20) | 53 (43.80) |
> 250 | 127 (12.1) | 76 (59.84) | 51 (40.16) |
Cigarette smoking | |||
Never | 843 (79.75) | 403 (47.86) | 440 (52.14) |
Lifetime | 214 (20.25) | 82 (38.32) | 132 (61.68) |
Current | 152 (14.38) | 63 (41.45) | 89 (58.55) |
Past | 62 (5.87) | 19 (30.63) | 43 (69.37) |
Age at first cigarette smoking | 19.67 (4.71) | 17.90 (3.37) | 20.34 (4.74) |
Cigarette smoking – duration (years) | |||
≤ 10 | 122 (11.5) | 69 (56.56) | 53 (43.33) |
> 10 | 92 (8.70) | 13 (14.13) | 79 (85.87) |
Cigarette smoking (total pack-years) | |||
≤ 5 | 165 (15.60) | 74 (44.85) | 91 (55.15) |
> 5 | 46 (4.40) | 7 (15.22) | 39 (84.78) |
Second-Hand Smoking | |||
Never | 664 (63.00) | 306 (46.50) | 358 (53.50) |
Lifetime | 390 (37.00) | 178 (45.64) | 212 (54.36) |
Second-Hand Smoking – duration (years) | |||
≤ 10 | 101 (9.58) | 57 (56.44) | 44 (43.56) |
10–20 | 139 (13.19) | 69 (49.64) | 70 (50.36) |
> 20 | 150 (14.23) | 52 (34.67) | 98 (65.33) |
Second-Hand Smoking – age period | |||
Before 19 years old | 170 (16.13) | 91 (53.53) | 79 (46.47) |
After 20 years old | 80 (7.59) | 29 (36.25) | 51 (83.75) |
Throughout life | 140 (13.28) | 58 (41.43) | 82 (58.57) |