. 2023 Sep 8;131(9):097005. doi: 10.1289/EHP12565

Table 9.

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

Report type^b	Race^c	$n$	Mean concern index^a (standard deviation)		Mean of the differences	$t$	$p$ -Value^d
Report type^b	Race^c	$n$	Baseline	After report-back	Mean of the differences	$t$	$p$ -Value^d
Personal	Non-Black	35	30.1 (10.2)	36.1 (10.1)	6.0	3.7	$less than 0.001$
Personal	Black	31	39.4 (9.9)	42.1 (10.8)	2.7	1.6	0.12
Aggregate	Non-Black	38	34.1 (8.9)	36.2 (10.5)	2.1	1.8	0.084
Aggregate	Black	31	38 (12.2)	40 (11)	2.0	1.1	0.28

^{^a}

Concern index was calculated as the sum of all 5-point concern variables (range of possible $scores equals 11 to 55$ ). Concern was rated as not at all concerned (1), slightly concerned (2), somewhat concerned (3), concerned (4), or very concerned (5).

^{^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 concern index within each report type by race subgroup.