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. Author manuscript; available in PMC: 2013 Jun 1.

Published in final edited form as: J Autoimmun. 2012 Feb 18;38(4):315–321. doi: 10.1016/j.jaut.2012.01.015

Table 2.

Parity, lifetime estrogen exposure and the risk for AID

AID	TS (224)			POI (457)
	G_n (n=8)	G₀ (n=216)	EExp %	G₊ (169)	G₀ (288)	EExp %
HT +	5 (62.5%)	77 (35.6%)	69±33 (n=82)	24 (14.2%)	45 (15.6%)	87±13 (n=69)
HT −	3 (37.5%)	139 (64.4%)	64±33 (n=142)	145 (85.8%)	243 (84.4%)	82±22 (n=388)
P	X²=2.27; P=0.13		P=0.28	X²=0.33; p=0.56		P=0.07
IBD/CD +	0	15 (6.9%)	64±36 (n=15)
IBD/CD −	8 (100%)	201 (93.1%)	64±32 (n=209)
P	X²=1.38; P=0.24		P=0.86

G_n denotes a history of at least one pregnancy; G₀ – no history of pregnancy; EExp%-estrogen exposure (calculation is explained in methods).