Table 1 The median concentration of PFAS (ng/mL) in the serum of the participants.

	N (weighted %)	PFOA	PFNA	PFDA	PFUnDA	PFHxS	PFOS
Overall
No Diseases	789 (29.6)	1.37	0.5	0.2	0.1	0.9	3.9
Hypertension	224 (8.4)	1.57	0.5	0.2	0.1	1.2	5.6
Hyperlipidemia	909 (34.1)	1.57	0.5	0.2	0.1	1.3	5
Comorbidity	743 (27.9)	1.77	0.7	0.2	0.1	1.5	7.1
P		< 0.05^a	< 0.05^a	< 0.05^b	< 0.05^b	< 0.05^a	< 0.05^c
Gender
Male
No Diseases	318 (24.5)	1.67	0.5	0.2	0.1	1.6	6
P (F)		< 0.05	< 0.05	< 0.05	0.40	< 0.05	< 0.05
Hypertension	107 (8.2)	1.67	0.5	0.2	0.1	1.6	7
P (F)		< 0.05	0.11	0.54	0.28	< 0.05	< 0.05
Hyperlipidemia	508 (39.2)	1.77	0.6	0.2	0.1	1.6	6.4
P (F)		< 0.05	< 0.05	< 0.05	0.63	< 0.05	< 0.05
Comorbidity	364 (28.1)	1.97	0.7	0.2	0.1	1.7	8.6
P (F)		< 0.05	0.64	0.53	0.80	< 0.05	< 0.05
Female
No Diseases	471 (34.4)	1.07	0.4	0.2	0.1	0.6	2.8
Hypertension	117 (8.6)	1.47	0.5	0.2	0.07	1	4.7
Hyperlipidemia	401 (29.3)	1.27	0.5	0.2	0.1	0.8	3.5
Comorbidity	379 (27.7)	1.57	0.7	0.2	0.1	1.2	5.7
Age
20–59
No Diseases	709 (40.1)	1.27	0.4	0.2	0.1	0.8	3.6
P (OA)		< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05
Hypertension	109 (6.2)	1.27	0.5	0.2	0.1	1.1	4.1
P (OA)		< 0.05	< 0.05	0.10	0.97	< 0.05	< 0.05
Hyperlipidemia	683 (38.6)	1.37	0.5	0.2	0.1	1.2	4.4
P (OA)		< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05
Comorbidity	267 (15.1)	1.47	0.6	0.2	0.1	1.1	5.2
P (OA)		< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05
60+
No Diseases	80 (8.9)	1.87	0.8	0.2	0.1	1.4	6.35
Hypertension	115 (12.8)	1.97	0.6	0.2	0.1	1.5	7.6
Hyperlipidemia	226 (25.2)	1.97	0.7	0.2	0.1	1.7	8.1
Comorbidity	476 (53.1)	1.935	0.7	0.2	0.1	1.65	8.45

^aMeant that there was no statistical difference in concentration between the hypertension and hyperlipidemia groups (P = 0.70–0.86), and there was a difference between any two other groups (P < 0.05). ^bIndicated that there was no statistical difference in the concentration among the disease-free group, the hypertension group and the hyperlipidemia group (P = 0.48–0.61), and there was a difference between the comorbidity group and the other three groups (P < 0.05). ^cRepresented a statistical difference in concentration between any two groups (P < 0.05). F represented compared with females. OA represented compared with older adults.
Significant values are in bold.

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