                                 0.00 (0.00--0.00)                                0.000                                        0.00 (0.00--0.00)   0.00   Postnatal maternal smoking                                    0.00 (0.00--0.00)                                0.000                                        0.00 (0.00--0.00)   0.000   Prenatal maternal smoking                                     0.00 (0.00--0.00)                                0.00                                         0.00 (0.00--0.00)   0.00   Number of household smokers               0                   0                                                                                             0                      0                                         0.00 (0.00--0.00)   0.00                                             0.00 (0.00--0.00)                            0.00                   \>0                                       0.00 (0.00--0.00)   0.000                                            0.00 (0.00--0.00)                            0.00                   Cigarettes per day by household smokers   0                   0                                                                                             0                      0--00                                     0.00 (0.00--0.00)   0.00                                             0.00 (0.00--0.00)                            0.00                   \>00                                      0.00 (0.00--0.00)   0.000                                            0.00 (0.00--0.00)                            0.00                  AOR: adjusted odds ratio; adjusted for children's sex, age, body mass index (BMI) z score, history of breastfeeding, gestational age at birth, birthweight, maternal age, living region, overcrowding of living area, household income, child care attendance, and presence of siblings.  Associations between ETS exposure and respiratory symptoms {#sec0.0} ----------------------------------------------------------  Young 