Table 3.

Fecundability ratios according to plasma PFOS and PFOA by parity

		Sample 1			Sample 2			Pooled analysis
		Crude FR	Adjusteda FR	95 % CI	Crude FR	Adjusteda FR	95 % CI	Crude FR	Adjustedb FR	95 % CI
PFOS
N	Q1	1.00	1.00		1.00	1.00		1.00	1.00
	Q2	1.16	1.16	0.77 - 1.75	0.97	0.89	0.68 - 1.17	1.02	0.98	0.78 - 1.23
	Q3	1.07	1.01	0.65 - 1.57	0.80	0.68	0.52 - 0.91	0.87	0.78	0.62 – 1.00
	Q4	0.98	0.97	0.62 - 1.51	0.79	0.69	0.53 - 0.91	0.84	0.79	0.63 – 0.99
	Log	1.06	1.02	0.72 – 1.44	0.75	0.62	0.47 – 0.83	0.86	0.78	0.63 – 0.97
P	Q1	1.00	1.00		1.00	1.00		1.00	1.00
	Q2	0.91	1.04	0.69 - 1.55	0.86	0.88	0.69 - 1.12	0.88	0.92	0.75 - 1.14
	Q3	0.95	1.05	0.69 - 1.60	0.71	0.72	0.56 – 0.94	0.77	0.80	0.65 – 0.99
	Q4	0.89	1.04	0.70 - 1.55	0.84	0.90	0.70 - 1.14	0.85	0.93	0.76 - 1.15
	Log	0.82	0.91	0.63 – 1.30	0.79	0.85	0.66 – 1.09	0.77	0.86	0.70 – 1.06
PFOA
N	Q1	1.00	1.00		1.00	1.00		1.00	1.00
	Q2	0.88	0.82	0.53 – 1.26	1.09	0.93	0.71 - 1.23	1.03	0.90	0.71 - 1.13
	Q3	1.15	1.11	0.73 – 1.69	0.94	0.80	0.71 - 1.07	0.99	0.90	0.71 - 1.13
	Q4	0.98	0.99	0.64 – 1.54	0.82	0.74	0.56 - 0.98	0.86	0.82	0.65 - 1.04
	Log	1.23	1.26	0.86 – 1.85	0.73	0.67	0.51 – 0.88	0.87	0.84	0.67 – 1.05
P	Q1	1.00	1.00		1.00	1.00		1.00	1.00
	Q2	1.19	1.30	0.86 – 1.98	0.78	0.76	0.59 - 0.96	0.85	0.86	0.70 – 1.06
	Q3	0.93	0.96	0.66 - 1.41	0.69	0.71	0.56 – 0.90	0.74	0.78	0.63 - 0.94
	Q4	0.70	0.74	0.48 - 1.13	0.76	0.78	0.61 – 0.99	0.74	0.76	0.61 – 0.94
	Log	0.64	0.66	0.46 – 0.95	0.74	0.76	0.61 – 0.93	0.68	0.72	0.61 – 0.87

^aAdjusted for age, socio-economic status, and body mass index. ^bAdditionally adjusted for sample

Abbreviations: Perfluorooctane sulfonate (PFOS), perfluorooctanoate (PFOA), nulliparous women (N), parous women (P), quartile (Q), log-transformed continuous exposure levels (Log), fecundability ratio (FR), 95 % confidence interval (95 % CI)