Table 3.

Unadjusted and adjusted logistic regression model of correlates of IT dependence

Unadjusted OR (95% CI)PaOR (95% CI)P
Demographics
Education
  <College educationRef.Ref.
≥College education0.60 (0.37–0.97)0.0370.84 (0.47–1.50)0.548
Melanoma risk factors
Intentional outdoor tanning1.39 (1.03–1.87)0.0291.29 (0.91–1.85)0.152
IT Behavior
Age of IT initiation, y0.79 (0.71–0.89)<0.0010.85 (0.74–0.97)0.017
 Past year IT frequency
1 or 2 timesRef.Ref.
3–9 times1.89 (0.81–4.39)0.4951.80 (0.67–4.81)0.774
10–19 times2.24 (0.89–5.61)0.9021.45 (0.49–4.30)0.612
≥20 times5.26 (2.27–12.21)<0.0013.03 (1.11–8.32)0.015
Opioid-like reactions1.57 (1.18–2.10)0.0021.06 (0.76–1.47)0.738
IT Beliefs & perceptions
Benefits of IT2.22 (1.52–3.25)<0.0012.15 (1.28–3.61)0.004
Attitudes3.43 (2.14–5.51)<0.0011.25 (0.67–2.31)0.478
Perceived susceptibility to risks2.19 (1.52–3.17)<0.0012.72 (1.67–4.42)<0.001
Perceived severity of risks0.75 (0.53–1.05)0.0920.88 (0.57–1.34)0.549
Psychologic risk factors
Self-esteem0.92 (0.88–0.96)<0.0011.01 (0.95–1.07)0.724
Appearance orientation2.68 (1.73–4.17)<0.0011.73 (1.03–2.90)0.037
Depressive symptoms
Screen – depressive symptomsRef.Ref.
Screen + depressive symptoms4.59 (2.69–7.83)<0.0013.79 (1.90–7.57)<0.001
Hosmer–Lemeshow χ25.18 (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.