Table 2:

Summary statistics for plasma cotinine levels, overall and by self-reported number of smokers in the household (participants without measured cotinine levels above the LOQ were assigned the sample LOQ).

Participants by self-reported SHS	Median plasma cotinine and IQR (ng/mL)
Overall (n=1,172)	0.05 (0.02, 0.17)
Current smokers in the household*
0 (n=777)	0.03 (0.02, 0.12)
1 (n=181)	0.14 (0.04, 0.42)
>=2 (n=58)	0.28 (0.08, 0.99)

^*Data restricted to 1016 participants with self-reported SHS exposure data