Table 2.

Estimated linear regression coefficient (95% CI) with predictors of IIRC groups, St Jude’s Staging, and International Staging System (ISS) by laterality

	IIRC staging		St. Jude’s Staging		ISS
	Unilateral (N=102)	Bilateral (N=66)	Unilateral (N=108)	Bilateral (N=69)	Unilateral (N=108)	Bilateral (N=69)
	B (95%CI)	B (95%CI)	B (95%CI)	B (95%CI)	B (95%CI)	B (95%CI)
Lag time (months)^†	0.040 (−0.049, 0.130)	0.062 (−0.059, 0.182)	0.004 (−0.159, 0.167)	0.237d (0.089,0.384)	0.038 (−0.170, 0.247)	0.330d (0.146, 0.514)
Maternal education	−0.023 (−0.054, 0.008)	−0.052d (−0.085, −0.019)	−0.093 d (−0.152, −0.033)	−0.022 (−0.064, 0.019)	−0.100c (−0.176, −0.024)	−0.017 (−0.069, 0.035)
Dirt floor during pregnancy	0.168 (−0.137, 0.473)	0.426a (−0.042, 0.894)	0.912 d (0.327, 1.498)	0.504a (−0.067, 1.075)	1.097d (0.348, 1.846)	0.879a (0.166, 1.592)
Monthly household Income^			0.247a (−0.037, 0.531)		0.137 (−0.226, 0.501)
R2	0.057	0.230	0.208	0.214	0.189	0.253

^ap<0.09;

^bp<0.05;

^cp<0.01;

^dp<0.005.

^{^}natural log transformed.

^†square root transformed for bilateral Rb