Table 3 Multivariable logistic regression model to predict the presence of MRSA.

   Age

0.971

(0.943 – 1.001)

0.056

   BMI

0.974

(0.932 – 1.018)

0.245

   Homeless currently or in the past year

1.814

(0.506 – 6.498)

0.360

   Prison resident or contact with prison resident currently or in past year

1.381

(0.666 – 2.865)

0.386

   Live in a group home currently or in past year

3.827

(0.702 – 20.847)

0.121

   Sex v No sex in past month

1.816

(0.835 – 3.950)

0.132

   Diabetes

1.373

(0.459 – 4.103)

0.570

   Immunosuppressed

0.573

(0.116 – 2.834)

0.495

   Abscess, boil, spider bite or other requiring physician in past year, or contact with someone

1.255

(0.623 – 2.525)

0.525

   Abscess

2.372

(0.831 – 6.769)

0.106

   Spontaneous

1.890

(0.868 – 4.114)

0.109

Parsimonious multivariable logistic model, C-statistic 0.734 (SE 0.038)

   Age

0.971

(0.945 – 0.997)

0.032

   Live in a group home currently or in past year

4.705

(1.173 – 18.871)

0.029

   Abscess

3.084

(1.227 – 7.754)

0.017

   Sex v No sex in past month

2.151

(1.047 – 4.422)

0.037