TABLE 3.

RRs and Propensity-Adjusted ORs for the Association Between Phototherapy and Cancer, by Cancer Site

	N a	Unadjusted Analyses			Propensity-Adjusted Analysesb
		RR	95% CI	P c	OR	95% CI	P
All cancer	1100	1.6	1.2 to 2.0	.002	1.4	1.1 to 1.9	.007
Leukemia	258	1.8	1.1 to 3.1	.03	1.8	1.1 to 3.1	.02
Lymphoid leukemia	139	1.3	0.6 to 2.9	.49	1.3	0.6 to 2.9	.55
Myeloid leukemia	113	2.7	1.4 to 5.2	.006	2.6	1.3 to 5.0	.005
Brain or nervous system cancer	183	1.1	0.5 to 2.4	.69	1.0	0.5 to 2.1	.97
Eye or orbit cancer	107	1.1	0.4 to 2.9	.79	1.0	0.4 to 2.7	.96
Kidney cancer	90	2.7	1.3 to 5.6	.01	2.5	1.2 to 5.1	.02
Liver cancer	83	0.7	0.2 to 2.8	1.0	0.6	0.2 to 2.5	.5
Soft tissue cancer	70	0.4	0.1 to 2.9	.52	0.4	0.1 to 2.7	.33
Other cancer	452	1.7	1.1 to 2.5	.01	1.6	1.1 to 2.4	.02

^aSome subjects had >1 type of cancer.

^bPropensity-adjusted model included a propensity score for phototherapy that included the following variables: gender, birth wt, gestational age, large for gestational age, twin birth, birth by cesarean delivery, payer source, year of birth, maternal race, paternal race, maternal Hispanic ethnicity, maternal age, paternal age, maternal education, paternal education, Down syndrome, other chromosomal anomalies, and nonchromosomal congenital anomalies. The propensity score had an area under the receiver operating characteristic curve of 0.67.

^cFisher’s exact test used.