Table 4.

Comparison of Checklist to Assess Pregnancy (Administered by Computer or in Person) With Urine Pregnancy Test Results Among Those Seeking Contraceptive Services^*

	Comparison of Results				Checklist Performance Measures (vs Urine Pregnancy Test as Reference Standard)
		Urine Pregnancy Test– Positive	Urine Pregnancy Test– Negative	Total	Sensitivity	Specificity	PPV	NPV
Audio computer-  assisted self-  interview  checklist	Pregnancy  possible	4	26	30	57.1 (18.4–90.1)	85.2 (79.1–90.1)	13.3 (3.8–30.7)	98.0 (94.4–99.6)
	Pregnancy  unlikely	3	150	153
	Total	7	176	183
In-person checklist	Pregnancy  possible	3	29	32	42.9 (9.9–81.6)	83.5 (77.2–88.7)	9.4 (2.0–25.0)	97.4 (93.4–99.3)
	Pregnancy  unlikely	4	147	151
	Total	7	176	183

PPV, positive predictive value; NPV, negative predictive value.

Data are n or % (95% confidence interval).

^*Defined as those who reported coming to the clinic “to get or change birth control.”