Table 3

Correlates of ever indoor tanning among females (n = 281)

% Ever

Tanned

Univariate

P valuea

Multivariate

P valueb

Characteristic

N

Indoors

OR (95% CI)

N

OR (95% CI)


Eye color

Brown

114

79

1.00

101

1.00

Hazel

55

75

0.78 (0.37 - 1.66)

51

0.76 (0.31 - 1.83)

Green

32

53

0.30 (0.13 - 0.69)

30

0.18 (0.07 - 0.50)

Blue/grey

80

72

0.70 (0.36 - 1.37)

0.047

74

0.72 (0.33 - 1.57)

0.008

Skin Color

Olive

57

75

1.00

Fair

166

77

1.10 (0.54 - 2.22)

Very fair

58

60

0.50 (0.22 - 1.10)

0.05

Skin reaction with first summer sun exposure

Sunburn

126

67

1.00

Tan

155

78

1.72 (1.01 - 2.92)

0.046

Skin reaction with prolonged sun exposure

Deep tan

48

88

1.00

42

1.00

No/Mild/Moderate Tan

233

70

0.34 (0.14 - 0.84)

0.009

214

0.37 (0.12 - 1.18)

0.07

BMI (kg/m2)

280

-

0.97 (0.92 - 1.01)

0.117

Pounds Gained since age 18 (per 10 lbs)

278

-

0.81 (0.66 - 0.99)

0.037

256

0.80 (0.63 -1.02)

0.063

Alcoholic drinks under age 25 (per 300 drinks)

275

-

1.01 (0.98 - 1.05)

0.454

Alcoholic drinks/year over age 25 (per 100 drinks)

262

-

1.00 (0.90 - 1.11)

0.988

Smoking Status

Not Current Smoker

238

72

1.00

Current Smoker

41

83

1.86 (0.79 - 4.41)

0.136

Education

Less than Bachelor's Degree

94

78

1.00

Bachelor's Degree or more

185

72

0.74 (0.41 - 1.32)

0.296

Sunbathing session ages 8-15 (per 50 sessions)

279

-

1.25 (1.13 - 1.39)

< 0.001

256

1.26 (1.11 - 1.42)

< 0.001

Sunbathing session ages 16-25 (per 50 sessions)

279

-

1.18 (1.09 - 1.29)

< 0.001

Sunbathing session ages 26+ (per 50 sessions)

257

-

1.29 (1.12 - 1.49)

< 0.001

256

1.23 (1.05 - 1.44)

0.003

Age at skin biopsy

281

-

0.98 (0.93 - 1.04)

0.549

256

0.90 (0.81 - 0.99)

0.037


aP values are from likelihood ratio tests comparing a model with the variable of interest to the null model.

bP values are from likelihood ratio tests comparing the full model to the full model minus the variable of interest.

BMI body mass index; CI confidence interval; OR odds ratio

Lostritto et al. BMC Public Health 2012 12:118   doi:10.1186/1471-2458-12-118

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