Unadjusted and adjusted logistic regression model of correlates of IT dependence
| Unadjusted OR (95% CI) | P | aOR (95% CI) | P | |
|---|---|---|---|---|
| Demographics | ||||
| Education | ||||
| <College education | Ref. | Ref. | ||
| ≥College education | 0.60 (0.37–0.97) | 0.037 | 0.84 (0.47–1.50) | 0.548 |
| Melanoma risk factors | ||||
| Intentional outdoor tanning | 1.39 (1.03–1.87) | 0.029 | 1.29 (0.91–1.85) | 0.152 |
| IT Behavior | ||||
| Age of IT initiation, y | 0.79 (0.71–0.89) | <0.001 | 0.85 (0.74–0.97) | 0.017 |
| Past year IT frequency | ||||
| 1 or 2 times | Ref. | Ref. | ||
| 3–9 times | 1.89 (0.81–4.39) | 0.495 | 1.80 (0.67–4.81) | 0.774 |
| 10–19 times | 2.24 (0.89–5.61) | 0.902 | 1.45 (0.49–4.30) | 0.612 |
| ≥20 times | 5.26 (2.27–12.21) | <0.001 | 3.03 (1.11–8.32) | 0.015 |
| Opioid-like reactions | 1.57 (1.18–2.10) | 0.002 | 1.06 (0.76–1.47) | 0.738 |
| IT Beliefs & perceptions | ||||
| Benefits of IT | 2.22 (1.52–3.25) | <0.001 | 2.15 (1.28–3.61) | 0.004 |
| Attitudes | 3.43 (2.14–5.51) | <0.001 | 1.25 (0.67–2.31) | 0.478 |
| Perceived susceptibility to risks | 2.19 (1.52–3.17) | <0.001 | 2.72 (1.67–4.42) | <0.001 |
| Perceived severity of risks | 0.75 (0.53–1.05) | 0.092 | 0.88 (0.57–1.34) | 0.549 |
| Psychologic risk factors | ||||
| Self-esteem | 0.92 (0.88–0.96) | <0.001 | 1.01 (0.95–1.07) | 0.724 |
| Appearance orientation | 2.68 (1.73–4.17) | <0.001 | 1.73 (1.03–2.90) | 0.037 |
| Depressive symptoms | ||||
| Screen – depressive symptoms | Ref. | Ref. | ||
| Screen + depressive symptoms | 4.59 (2.69–7.83) | <0.001 | 3.79 (1.90–7.57) | <0.001 |
| Hosmer–Lemeshow χ2 | — | 5.18 (8 df) | 0.738 | |
NOTE: Variables correlated with IT dependence at P < 0.10 in two-sample comparisons in Table 1 were included in regression models.