Table 5.
Full diagnostic (logistic) model for colon preparation adequacy, including the intercept (Model C)
| Intercept and Predictors | Coefficient | SE | OR | 95% CI | P-value | |
|---|---|---|---|---|---|---|
| General characteristics | ||||||
| Intercept | -2.27 | 0.23 | - | - | ||
| Age (Years old) | 0.01 | 0.00 | 1.01 | 1.00- 1.02 | < 0.0001 | |
| Gender | Female | |||||
| Male | 0.13 | 0.11 | 1.14 | 0.93- 1.41 | 0.205 | |
| Ethnicity | Fars | |||||
| Non-Fars | 0.06 | 0.10 | 1.06 | 0.87- 1.29 | 0.551 | |
| BMI | 25 | |||||
| >25 | 0.51 | 0.11 | 1.67 | 1.33- 2.09 | < 0.0001 | |
| Abdominal circumference | 95 | |||||
| >95 | 0.39 | 0.12 | 1.48 | 1.17- 1.86 | 0.001 | |
| Education | Educated | |||||
| Illiterate | 0.32 | 0.15 | 1.37 | 1.02- 1.86 | 0.039 | |
| Fruit consumption | High | |||||
| Never/Low | 1.07 | 0.10 | 2.90 | 2.38- 3.54 | < 0.0001 | |
| Smoking | Never | |||||
| Ever | 0.28 | 0.14 | 1.32 | 1.01- 1.72 | 0.041 | |
| Physical activity | Never | |||||
| Ever | 0.12 | 0.12 | 1.13 | 0.89- 1.43 | 0.315 | |
| History of Diabetes | No | |||||
| Yes | 0.50 | 0.19 | 1.65 | 1.14- 2.41 | 0.008 | |
| Constipation | No | |||||
| Yes | -0.19 | 0.10 | 0.83 | 0.68- 1.01 | 0.060 | |
| NSAID | No | |||||
| Yes | -0.92 | 0.28 | 0.40 | 0.23- 0.69 | 0.001 | |
| SSRI | No | |||||
| Yes | -0.97 | 0.28 | 0.38 | 0.21- 0.66 | 0.001 | |
| LR chi2 | 252.19 | |||||
| Hosmer-Lemshow GOF | X2 = 4.48, P value= 0.811 | |||||
| ROC area (95% CI) | 0.70 (0.68, 0.72) | |||||
Predictor value that is one when it is present and zero when it is absent. SE: Standard error. OR: Odds Ratio. X2: Chi square statistic. GOF: Goodness of fit. ROC = Receiver-operating characteristic.