Table 1.
Results of hierarchical linear regression analyses of cotinine measures regressed onto smoking factors
| Cotinine outcome measure | Maximum value | Minimum value | Range of values | Total AUC |
|---|---|---|---|---|
| B (SE) | B (SE) | B (SE) | B (SE) | |
| Characteristics, Adjusted R2 | 0.2 | 0.3 | 0.1 | 0.3 |
| Age smoking fairly regularly (years) | 1.8 (6.4) | −2.0 (3.7) | 3.8 (3.3) | 1.5 (26.0) |
| Duration of non-daily smoking (months) | 1.2 (5.4) | 0.9 (3.2) | 0.3 (2.8) | 3.8 (22.0) |
| Converted vs. native non-daily smoker | −29.3 (72.5) | −19.2 (42.6) | −10.2 (37.7) | − 46.1 (297.0) |
| Menthol vs. regular preference | 142.7 (62.8)b | 118.3 (36.9)a | 24.4 (32.6) | 727.9 (257.2)b |
| NMR (log)d | 132.8 (88.2) | 60.6 (51.8) | 72.1 (45.8) | 471.2 (361.2) |
| Time to first cigarette after waking (minutes) | −0.4 (0.1)a | −0.3 (0.1)a | − 0.2 (0.1)b | −1.9 (0.5)a |
| Nicotine dependence severityc | −0.6 (17.0) | − 0.9 (10.0) | 0.3 (8.8) | −5.4 (69.7) |
| Activities, Adjusted R2 | 0.3 | 0.2 | 0.3 | 0.3 |
| Performative | 14.2 (10.0) | 6.0 (6.5) | 8.2 (4.7) | 49.5 (42.7) |
| Leisure | 9.9 (6.7) | 4.2 (4.4) | 5.7 (3.2) | 44.7 (28.5) |
| Social | 2.2 (8.5) | −5.5 (5.6) | 7.6 (4.0) | −15.5 (36.2) |
| Interactive | 72.0 (19.3)a | 40.2 (12.7)a | 31.8 (9.1)a | 310.6 (82.6)a |
| Emotions, Adjusted R2 | 0.3 | 0.2 | 0.4 | 0.2 |
| Positive | 13.7 (7.4) | −0.34 (4.9) | 14.0 (3.2)a | 34.1 (32.6) |
| Negative | 33.1 (8.7)a | 17.6 (5.7)a | 15.5 (3.8)a | 126.5 (38.3)a |
| Mixed | 53.5 (29.4) | 38.1 (19.4) | 15.4 (12.9) | 256.0 (130.2) |
| Neutral | −3.4 (12.2) | 1.1 (8.0) | −4.4 (5.4) | 14.8 (54.0) |
Covariates included years of age, sex, race, total family annual income, and marital status
AUC area under the curve, NMR nicotine metabolite ratio
ap < .003, b p < .05
cHooked on Nicotine Checklist total score
dResults did not vary when continuous NMR was replaced by slow vs. normal metabolizer NMR variable