s of the study participants, Hong Kong, 0000--0000 (N=0000)    *ETS exposure*                                  *Any doctor consultation in the past 0 months*   *Any hospitalisation in the past 0 months*                          ----------------------------------------- ----- ------------------------------------------------ -------------------------------------------- ---- ------ ------- --   Presence of household smokers             No    000                                              00.0                                              00     0.0        Yes                                       000   00.0                                             0.0000                                       00   0.0    0.000      Postnatal maternal smoking                No    000                                              00.0                                              00     0.0        Yes                                       00    00.0                                             0.0000                                       0    00.0   0.00