From: Managing missing items in the Fagerström Test for Nicotine Dependence: a simulation study
FTND item number | Question with answer scoring | Missing N (%) | Mean (SD) | Spearman rank correlation of item with total of remaining items |
---|---|---|---|---|
1 | How soon after you wake up do you smoke or use tobacco? 0 = after 60 min. 1 = 31-60 min. 2 = 6-30 min. 3 = within 5 min. | 269 (0.7%) | 2.0 (1.0) | 0.48 |
2 | Do you find it difficult to refrain from smoking in forbidden places (e.g., church, library, cinema)? 0 = No 1 = Yes | 378 (1.0%) | 0.3 (0.4) | 0.26 |
3 | Which cigarette would you hate to give up? 0 = any other time 1 = first in the morning | 386 (1.0%) | 0.6 (0.5) | 0.35 |
4 | How many cigarettes per day do you smoke? 0 = 10 or less 1 = 11-20 2 = 21-30 3 = 31+ | 159 (0.4%) | 0.9 (0.8) | 0.36 |
5 | Do you smoke more frequently during the first hours after waking than during the rest of the day? 0 = No 1 = Yes | 402 (1.0%) | 0.4 (0.5) | 0.31 |
6 | Do you smoke if you are so ill that you are in bed most of the day? 0 = No 1 = Yes | 388 (1.0%) | 0.5 (0.5) | 0.31 |
Total FTND score | Possible range: 0-10. Higher scores indicate higher nicotine dependence: 0-2 Very low 3-4 Low 5 Medium 6-7 High 8-10 Very high | 408 (1.1%) | 4.7 (2.3) | - |