Relationship with DAP and predicted probability, sensitivity, specificity, AuROC, PPV and NPV of other questions
| n | Median DAP score | IQR | P value | Predicted probability of pregnancy | 95% CI | Sensitivity | Specificity | AuROC | PPV | NPV | |
| APPS score* | 78% | 74% | 0.76 | 36% | 95% | ||||||
| 5 | 265 | 3.64 | 3.29 to 3.86 | <0.001 | 0.03 | 0.019 to 0.044 | |||||
| 10 | 59 | 2.50 | 2.29–2.71 | 0.09 | 0.063 to 0.107 | ||||||
| 15 | 35 | 1.71 | 1.50–2.07 | 0.21 | 0.173 to 0.243 | ||||||
| 20 | 13 | 1.07 | 0.86–1.50 | 0.47 | 0.362 to 0.490 | ||||||
| 25 | 42 | 0.57 | 0.36–0.64 | 0.68 | 0.594 to 0.761 | ||||||
| Overall, when I think about becoming pregnant in the next 3 months, I feel: | |||||||||||
| Mostly positive | 117 | 0.64 | 0.43–0.93 | <0.001 | 0.56 | 0.47 to 0.65 | 75% | 76% | 0.75 | 37% | 94% |
| More positive than negative | 84 | 1.29 | 1.07–1.64 | 0.37 | 0.26 to 0.48 | ||||||
| In the middle | 107 | 2.00 | 1.57–2.36 | 0.14 | 0.07 to 0.21 | ||||||
| Don't feel strongly | 21 | 2.14 | 2.00–2.43 | 0.07 | −0.06 to 0.19 | ||||||
| More negative than positive | 264 | 2.64 | 2.36–3.00 | 0.09 | 0.06 to 0.13 | ||||||
| Mostly negative | 395 | 3.50 | 3.14–3.79 | 0.03 | 0.02 to 0.05 | ||||||
| Are you currently trying to get pregnant? | |||||||||||
| Yes | 80 | 0.64 | 0.36–0.86 | <0.001 | 0.69 | 0.58 to 0.50 | 37% | 97% | 0.67 | 69% | 89% |
| No | 907 | 2.79 | 2.07–3.43 | 0.11 | 0.09 to 0.13 | ||||||
| Are you thinking about trying to get pregnant in the next year? | |||||||||||
| Yes | 96 | 1.21 | 0.79–1.71 | <0.001 | 0.53 | 0.42 to 0.63 | 71% | 84% | 0.77 | 34% | 96% |
| Maybe | 97 | 1.86 | 1.36–2.21 | 0.15 | 0.07 to 0.22 | ||||||
| No | 707 | 3.07 | 2.57–3.57 | 0.04 | 0.20 to 0.06 | ||||||
*APPS score is continuous from 5 to 25, 5 points shown for illustration, therefore, n does not add up to the full sample.
APPS, Attitude towards Potential Pregnancy Scale; AUROC, area under the receiver operating curve; DAP, Desire to Avoid Pregnancy; NPV, negative predictive value; PPV, positive predictive value.