Table 11.

Mean behavior index at baseline and after report-back by report type and participant race.

Report typeb	Racec	$n$	Mean behavior indexa (standard deviation)		Mean of the differences	$t$	$p$-Valued
			Baseline	After report-back
Personal	Non-Black	35	8.2 (1.3)	8.9 (1.1)	0.750	4.10	$<0.001$
Personal	Black	31	8.3 (1.3)	8.4 (1.6)	0.075	0.25	0.81
Aggregate	Non-Black	38	8.5 (1.4)	8.6 (1.6)	0.140	0.77	0.45
Aggregate	Black	31	8.1 (1)	8.9 (1.5)	0.730	2.60	0.016

^a Behavior index was calculated as the sum of behaviors asked of all participants, where each behavior was rescaled to span from 0 to 1, with 1 representing the most protective environmental health action (range of possible $\text{scores}=0–14$). When a response to a behavior question was missing at one interview only, we substituted the participant’s response from the alternate interview during the calculation of the behavior index.

^b Personal reports included individual-level exposure results in comparison with the study population and national benchmarks. Aggregate reports did not include individual-level exposure results.

^c Self-reported race/ethnicity was categorized as Black if the participant indicated African American/Black as one of her races in answer to a question allowing multiple response categories for race and ethnicity. Non-Black participants indicated that their race was non-Hispanic White, Hispanic, Asian, or mixed race and not Black.

^d Paired $t$-tests were used to test for change in behavior index within each report type by race subgroup.