Table 5.

Geometric mean (geometric standard deviation) ΣPFAS concentrations in tap water (ng/L) and house dust (ng/g) for questionnaire responses from the subset of AHHS II homes. Statistically significant associations (p < 0.05) from ANOVAs between questionnaire variables and log-transformed ΣPFAS concentrations are marked with an asterisk (*), and non-significant associations (0.05 < p < 0.10) are marked with an apostrophe (‘). N denotes the number of responses for each category.

Survey Question	n	Tap Water ΣPFAS	House Dust ΣPFAS
Annual Household Income
Less than $35 K	93	8.05 (2.56)	46.53 (3.61)*
More than $35 K	139	7.97 (2.46)	82.09 (4.92)
Race
White	183	8.08 (2.58)	72.48 (4.30)*
Non-White or Biracial	58	8.73 (2.55)	43.82 (5.08)
Number of Household Members
1 or 2	141	9.09 (2.62)’	82.76 (4.76)*
3 or more	100	7.16 (2.46)	44.90 (3.93)
Children Under Age 18 in Home
Yes	87	7.16 (2.49)’	47.00 (4.89)*
No	154	8.91 (2.59)	76.59 (4.24)
Own or Rent Home
Own	163	7.84 (2.60)	86.71 (4.76)*
Rent	78	9.13 (2.48)	34.28 (3.29)
Home Age
Built in 1980 or Before	105	7.55 (2.49)	94.04 (4.58)*
Built After 1980	55	9.00 (2.94)	52.64 (4.65)
Time Since Last Vacuumed
1 month or less	148	-	58.23 (4.31)’
1–3 months	43	-	53.67 (4.91)
> 3 months	26	-	119.60 (4.78)
Tap Water Source
Public water supply	216	8.77 (2.49)*	62.33 (4.44)
Private well	21	4.28 (2.96)	104.28 (5.14)