Table 2.
Item means, level of AS where each item option is expected to be observed, and each item’s level of discrimination estimated by the Graded Response Model.
| ASI Item | Item Content | M (SD) | Some Threshold1 | A Little Threshold 2 | Much Threshold 3 | Very Much Threshold | Discrimination |
|---|---|---|---|---|---|---|---|
| 1 | It is important not to appear nervous. | 2.20(1.23) | -- | -- | -- | -- | -- |
| 2 | When I cannot keep my mind on a task, I worry that I might be going crazy. | 0.76(1.08) | 0.316 | 0.968 | 1.718 | 2.627 | 2.169 |
| 3 | It scares me when I feel shaky. | 1.41(1.21) | −0.631 | 0.197 | 1.022 | 1.816 | 2.960 |
| 4 | It scares me when I feel faint. | 1.71(1.21) | −0.988 | −0.065 | 0.757 | 1.692 | 2.117 |
| 5 | It is important to me to stay in control of my emotions. | 2.87(1.06) | -- | -- | -- | -- | -- |
| 6 | It scares me when my heart beats rapidly. | 1.89(1.31) | −1.147 | −0.238 | 0.537 | 1.494 | 2.123 |
| 7 | It embarrasses me when my stomach growls. | 1.15(1.29) | -- | -- | -- | -- | -- |
| 8 | It scares me when I am nauseous. | 1.20(1.21) | −0.417 | 0.537 | 1.295 | 2.353 | 1.831 |
| 9 | When I notice my heart beating rapidly, I worry that I might be having a heart attack. | 0.88(1.21) | -- | -- | -- | -- | -- |
| 10 | It scares me when I become short of breath. | 1.66(1.32) | −0.844 | 0.065 | 0.768 | 1.635 | 2.096 |
| 11 | When my stomach is upset, I worry that I might be seriously ill. | 0.64(1.03) | 0.479 | 1.263 | 1.803 | 2.607 | 2.113 |
| 12 | It scares me when I am unable to keep my mind on a task. | 1.19(1.22) | −0.364 | 0.514 | 1.313 | 2.203 | 1.944 |
| 13 | Other people notice when I feel shaky. | 1.21(1.25) | −0.301 | 0.446 | 1.360 | 2.176 | 1.766 |
| 14 | Unusual body sensations scare me. | 1.89(1.20) | −0.417 | 0.540 | 1.352 | 2.152 | 2.077 |
| 15 | When I am nervous, I worry that I might be mentally ill. | 0.67(1.14) | 0.559 | 1.131 | 1.540 | 2.047 | 2.461 |
| 16 | It scares me when I am nervous. | 1.10(1.22) | −0.175 | 0.584 | 1.189 | 1.907 | 2.974 |
Note: ASI scores range from 0 – 4 corresponding to options ‘Not at all’, ‘Some’, ‘A little’, ‘Much’, and ‘Very Much’. Threshold 1 corresponds to the level of AS where smokers begin to report ‘Some’ rather than ‘Not at all’. Thresholds 2–4 correspond to the level of AS where smokers begin to report the next highest response category.