Table 3. Mothers’ pregnancy intention and concern about radiation contamination of breast milk among primiparas in 2012 and 2013.

Primiparab	Pregnancy intention		aORa	(95% CI)	P value
	No	Yes
Concern about radiation contamination of breast milk
No (n = 6,251)	1,224 (19.6)	5,027 (80.4)	Reference
Yes (n = 69)	25 (36.2)	44 (63.8)	0.61	(0.46–0.80)	<0.001
Multiparac
No (n = 7,051)	4,975 (70.6)	2,076 (29.4)	Reference
Yes (n = 119)	25 (70.6)	44 (29.4)	1.02	(0.82–1.26)	0.88

aOR, adjusted odds ratio; CI, confidence interval.

^aFactors listed in the analysis among primiparas in Table 3 were entered into binominal logistic regression.

^bAmong adjusted variables for primiparas, P value was less than 0.01 for survey year (aOR 0.82 for 2013), maternal age (aOR 0.91 for 1-year increase), subjective health (aOR 0.70 for poor), depressive symptoms (aOR 0.63 for positive symptoms), living with husband (aOR 0.24 for not living together), and child abnormality at birth (aOR 0.69 for having abnormality).

^cAmong adjusted variables for multiparas, P value was less than 0.01 for survey year (aOR 1.3 for 2013), maternal age (aOR 0.88 for 1-year increase), subjective health (aOR 0.78 for poor), depressive symptoms (aOR 0.72 for positive symptoms), and infertility treatment (aOR 2.07 for receiving the treatment).