Item and scale characteristics
| Subscales and abbreviated items | Mean±SD* | Item–total correlation | |
|---|---|---|---|
| Intrinsic factors (n=181) | |||
| 1 | Withdrawal symptoms | 2.77±1.03 | 0.64 |
| 2 | Feeling lost without cigarettes | 2.60±1.05 | 0.66 |
| 3 | Being addicted to cigarettes | 3.09±1.06 | 0.59 |
| 4 | Having strong emotions or feelings | 2.46±1.07 | 0.64 |
| 5 | Something stressful happened | 2.66±1.17 | 0.57 |
| 6 | Thinking about never being able to smoke again | 2.10±1.08 | 0.59 |
| 7 | Getting bored | 2.46±1.12 | 0.60 |
| 8 | Seeing things/people which reminded me of smoking | 2.37±1.15 | 0.56 |
| 9 | Easy availability of cigarettes | 2.38±1.27 | 0.46 |
| Extrinsic factors (n=178) | |||
| 10 | Difficulty in finding someone to help me to stop smoking | 1.65±1.03 | 0.66 |
| 11 | Lack of support from health professionals to stop smoking | 1.56±0.94 | 0.48 |
| 12 | The cost of stop-smoking medicines | 1.85±1.19 | 0.53 |
| 13 | Fear of side effects from stop-smoking medicines | 1.61±0.94 | 0.56 |
| 14 | Lack of encouragement from family or friends to stop smoking | 1.76±1.00 | 0.49 |
| 15 | Fear of weight gain if I stopped smoking | 2.03±1.15 | 0.38 |
| 16 | Family members or friends encouraging me to smoke | 1.37±0.81 | 0.33 |
| 17 | Fear of failing to stop smoking | 2.38±1.19 | 0.60 |
| 18 | Belief that medicines to stop smoking do not work | 1.81±1.04 | 0.49 |
| 19 | Fear that stopping smoking may interrupt social relationships | 1.58±0.95 | 0.43 |
| 20 | Belief that I can stop smoking in the future if I need to | 2.08±1.13 | 0.47 |
| 21 | Use of other substances such as cannabis, alcohol, etc | 1.54±0.98 | 0.27 |
*Mean of response to individual items on a four-point (1–4) scale, where 1=not a challenge and 4=major challenge.