Table 2.

Healthy pregnancy knowledge of women and their partners

		% correct		Measures of agreement
Item	Correct answer	Woman	Partner	κa	p	McNemar Indexb	p
1. Prenatal cigarette smoking is a preventable cause of low birth weight and fetal growth and retardation.	T	94.0	94.2	.187	.004	0.200	.655
2. All caffeine use must be eliminated during pregnancy.	F	84.0	61.6	.149	.007	32.287	<.001
3. The impact of prenatal marijuana use on birth outcome is not clearly known.	T	53.0	45.2	.039	.539	3.139	.076
4. The effects of prenatal cocaine exposure are related to amount and timing of use.	T	88.8	94.6	.390	<.001	5.762	.016
5. No universally safe level of prenatal alcohol use has been established.	T	79.9	64.9	−.070	.247	12.462	.000
6. Prenatal alcohol exposure may have negative effects potentially throughout pregnancy.	T	94.0	96.3	.038	.539	1.636	.201
7. Binge drinking (5+ drinks per episode) is less harmful than drinking one drink a day for 5 days.	F	92.8	92.8	.012	.856	0.926	.336

Notes: T = true; F = false.

^aThe kappa statistic takes into account agreement between the subject and her partner that results from the element of chance;

^bthe McNemar Index expresses the difference in disagreement between the subject and her partner as a proportion of the total number of disagreements.