Simple and Multivariable Logistic Regression
When controlling for other covariates the adjusted model resulted in a decreased likelihood of a discordant referral for those with high-grade lesions (ASCH/AGC/HSIL) (OR: 0.03; CI: 0.006, 0.166; p<0.001) compared to those with low grade or no lesions (ASCUS/LSIL/NILM) results. These results suggest that those with low-grade lesions are 97 times more likely to be incorrectly referred for a colposcopy. The adjusted models’ odds of a discordant referral with high-grade lesions was much lower than the univariate regression for the odds of a discordant referral with high-grade lesions (OR: 0.75; CI: 0.58, 0.96; p<0.05). The likelihood of a discordant referral from a family medicine provider (OR:7.72; CI: 2.23, 26.69; p<0.01)and internal medicine provider (OR:10.94; CI: 2.56, 46.79; p<0.01) compared to an OBGYN is also much higher in the adjusted model compared to the likelihood of a discordant referral from a family medicine provider (OR:4.12; CI:1.58,10.74; p<0.01) and internal medicine (OR:5.42; CI:1.63,18.03; p<0.01) physician in the unadjusted model. The likelihood of a discordant referral in patients under 24 years of age (OR: 19.55; CI: 7.62,50.15; p<0.001) compared to women between the ages of 25 and 29 is much higher in the adjusted model compared to women under the age of 24 (OR:7.80; CI:4.09,14.86; p<0.001) in the unadjusted model. The multivariate logistic model strongly predicted similar rates of correct referrals to those observed in the sample (c-statistic 0.873).