      Postnatal maternal smoking                No    000                                                                  00.0                                                                                        0          Yes                                       00    00.0                                                                 0.00                                                                   0.00 (0.00--0.00)    0.00       Prenatal maternal smoking                 No    000                                                                  00.0                                                                                        0          Yes                                       0     00.0                                                                 0.0                                                                    0.00 (0.00--0.00)    0.00       Number of household smokers               0     000                                                                  00.0                                                                                        0          0                                         000   00.0                                                                 0.00                                                                   0.00 (0.00--0.00)    0.00       \>0                                       00    00.0                                                                 0.00                                                                   0.00 (0.00--0.00)    0.00       Cigarettes per day by household smokers   0     000                                                                  00.0                                                                                        0          0--00                                     000   00.0                                                                 0.00                                                                   0.00 (0.00--0.00)    0.00       \>00                                      00    00.0                                                                 0.000                                                                  0.00 (0.00--0.00)    0.00