Effects of seasonal variations and meteorological factors on IVF pregnancy outcomes: a cohort study from Henan Province, China

Table 5 Sensitivity analyses

	Biochemical pregnancy rate			Clinical pregnancy rate			Early abortion rate			Live birth rate
	P	OR	95% CI	P	OR	95% CI	P	OR	95% CI	P	OR	95% CI
Season		0.319			0.027			0.802			0.195
Winter		1.00	(Reference)		1.00	(Reference)		1.00	(Reference)		1.00	(Reference)
Spring	0.392	1.168	(0.819,1.666)	0.146	1.285	(0.917,1.800)	0.513	1.186	(0.711,1.980)	0.084	1.259	(0.969,1.636)
Summer	0.142	1.323	(0.910,1.924)	0.021	1.521	(1.064,2.174)	0.427	1.239	(0.730,2.105)	0.046	1.323	(1.005,1.741)
Autumn	0.877	0.971	(0.671,1.405)	0.780	1.051	(0.740,1.495)	0.963	1.014	(0.578,1.778)	0.318	1.151	(0.873,1.519)
Meteorological factors
Daily average temperature (°C) Daily average humidity (%) Sunshine duration (hr)	0.464 0.901 0.968	1.005 0.999 0.999	(0.991,1.020) (0.992,1.008) (0.960,1.040)	0.042 0.742 0.228	1.014 0.999 0.977	(1.001,1.029) (0.991,1.006) (0.940,1.015)	0.170 0.271 0.632	1.019 1.008 1.018	(0.992,1.047) (0.994,1.023) (0.947,1.093)	0.165 0.359 0.145	1.009 0.997 0.973	(0.996,1.023) (0.989,1.004) (0.938,1.009)

Reference, this variable functions as an indicator
Biochemical pregnancy adjusted by basal anti-Mullerian hormone (AMH) level, total dosage of gonadotropin (Gn) used, number of 2PN fertilization, number of 2PN cleavage; clinical pregnancy adjusted by basal AMH level, total dosage of Gn used, number of 2PN fertilization, and number of 2PN cleavage; early abortion adjusted by duration of infertility; live birth adjusted by age, duration of infertility, total dosage of Gn used, number of 2PN fertilization, and number of 2PN cleavage

ISSN: 1477-7827