. 2016 Jul 22;16:623. doi: 10.1186/s12889-016-3254-z

Table 3.

Effects of perinatal secondhand smoke exposure on suicidal ideation by perinatal period^b and on perinatal depression by age according to logistic regression models

Suicidal ideation vs. Perinatal period^a	1^st trimester		2^nd trimester		3^rd trimester
Suicidal ideation vs. Perinatal period^a	OR	95 % CI	OR	95 % CI	OR	95 % CI
High secondhand smoke exposure	1.39	0.16 ~ 11.91	7.63**	3.25 ~ 17.93	4.03*	1.76 ~ 9.23
Depression vs. Age (years)^c	≤25		26 ~ 35		≥36
Depression vs. Age (years)^c	OR	95 % CI	OR	95 % CI	OR	95 % CI
High secondhand smoke exposure	2.05	0.80 ~ 5.22	1.71***	1.27 ~ 2.29	0.84	0.42 ~ 1.67

*p < 0.05; **p < 0.01; ***p < 0.001. OR, odds ratio; CI confidence interval

^aModel was adjusted for perinatal period, marital status, monthly income, employment status, educational level, planned pregnancy, history of depression, sleep problems, and secondhand smoking

^bThe postpartum data were invalid because no participant exposed to secondhand smoke reported suicidal ideation

^cModel was adjusted for perinatal period, marital status, monthly income, employment status, educational level, planned pregnancy, history of depression, and sleeping problems