Symptoms | Total number of smokers reporting this symptom | Median latency from monthly smoking to symptom onset (days) | Mean latency (days) | SD (days) | Range (days) | 1st quartile (days) | 2nd quartile (days) | 3rd quartile (days) |
---|---|---|---|---|---|---|---|---|
*Negative numbers indicate that the symptom preceded the onset of monthly smoking. | ||||||||
†The wording of this item is “do you smoke now because it is really hard to quit?” The dates associated with this item represent the date of the interview and not the date when the symptom first appeared. | ||||||||
1) Failed quit attempt | 74 | 219 | 359 | 366 | −212 to 1440* | 86 | 218 | 528 |
2) Really hard to quit† | 34 | 589 | 630 | 369 | 75 to 1597 | 366 | 587 | 845 |
3) Felt addicted | 66 | 215 | 378 | 417 | 0 to 1502 | 32 | 187 | 620 |
4) Strong cravings | 86 | 141 | 277 | 389 | − 500 to 1484 | 20 | 131 | 447 |
5) Really needed a cigarette | 91 | 179 | 241 | 393 | − 1049 to 1287 | 15 | 179 | 439 |
6) Hard to refrain | 43 | 316 | 424 | 487 | − 292 to 2025 | 99 | 316 | 608 |
7) Hard to concentrate | 57 | 215 | 393 | 419 | − 292 to 1502 | 62 | 215 | 570 |
8) Irritable | 68 | 213 | 366 | 416 | − 487 to 1502 | 51 | 197 | 608 |
9) Strong need or urge | 79 | 202 | 364 | 432 | − 710 to 1707 | 54 | 202 | 547 |
10) Nervous, restless or anxious | 68 | 330 | 371 | 404 | − 609 to 1707 | 61 | 304 | 522 |
11) Sad, blue or depressed | 34 | 200 | 389 | 516 | − 547 to 1430 | 61 | 194 | 861 |