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Table 3 Variables associated with self-reported ever indoor tanning among undergraduate students (n = 1353)

From: Intentional tanning behaviors among undergraduates on the United States’ Gulf Coast

Variable Ever indoor tanned N (%) Odds Ratio 95% CI Adjusted Odds Ratio 95% CI
Age
 18 years old (ref) 104 (7.7) 1.00   1.00  
 19 years old 216 (16.0) 1.05 0.77–1.44 0.97 0.64–1.48
 20 years old 211 (15.6) 1.27 0.92–1.74 0.87 0.52–1.46
 21 years old 219 (16.2) 1.62 1.18–2.24 1.06 0.61–1.84
 22+ years old 603 (44.6) 2.00 1.51–2.66 1.71 1.02–2.86
Year
 Freshman (ref) 224 (16.6) 1.00   1.00  
 Sophomore 272 (20.1) 1.30 1.02–1.65 1.22 0.85–1.75
 Junior 386 (28.5) 1.70 1.35–2.13 1.43 0.93–2.18
 Senior 471 (34.8) 2.11 1.69–2.64 1.34 0.86–2.09
Sex
 Male (ref) 294 (21.8) 1.00   1.00  
 Female 1055 (78.2) 2.40 2.02–2.86 1.65 1.34–2.04
Race
 White (ref) 1111 (82.1) 1.00   1.00  
 Black or African American 106 (7.8) 0.19 0.15–0.24 0.56 0.39–0.80
 Other 136 (10.1) 0.43 0.34–0.54 0.68 0.50–0.94
Alabama Resident
 No (ref) 252 (18.7) 1.00   1.00  
 Yes 1099 (81.3) 1.24 1.03–1.51 1.44 1.14–1.83
Immediate family member with history of melanoma
 No (ref) 1032 (76.3) 1.00   1.00  
 Yes 118 (8.7) 1.65 1.20–2.26 1.01 0.69–1.49
 Don’t know/Not sure 203 (15.0) 0.73 0.59–0.90 0.76 0.59–0.98
Fitzpatrick score
 Fitzpatrick Type V/VI (ref) 205 (15.2) 1.00   1.00  
 Fitzpatrick Type I/II 208 (15.4) 2.29 1.76–2.96 0.83 0.56–1.23
 Fitzpatrick Type III 477 (35.3) 3.11 2.49–3.89 1.06 0.76–1.48
 Fitzpatrick Type IV 463 (34.2) 2.26 1.82–2.81 1.13 0.85–1.50
Number of lifetime blistering sunburns
 None (ref) 368 (27.2) 1.00   1.00  
 1–2 571 (42.2) 2.00 1.67–2.40 1.17 0.92–1.49
 3–5 305 (22.5) 2.40 1.92–3.07 1.36 1.01–1.83
 6 or more 109 (8.1) 3.00 2.11–4.26 2.06 1.33–3.20
Outdoor tanner
 No (ref) 242 (17.9) 1.00   1.00  
 Yes 1111 (82.1) 5.33 4.46–6.37 2.47 1.97–3.10
Ever spray tanned
 No (ref) 870 (64.3) 1.00   1.00  
 Yes 483 (35.7) 7.70 6.00–9.87 3.34 2.51–4.45
Intend to use tanning bed next 12 months
 No (ref) 925 (68.4) 1.00   1.00  
 Yes 428 (31.6) 43.53 24.90–76.07 22.82 12.85–40.54