بررسی رابطه دود سیگار محیطی با طول مدت شیردهی

Due to importance of breast feeding on physical and mental health of &nbsp;&nbsp;&nbsp; infants , it&nbsp;&nbsp; is&nbsp;&nbsp; necessary&nbsp; to&nbsp; recognize&nbsp; the&nbsp; influenting factors&nbsp; on the time &nbsp;&nbsp;&nbsp; duration&nbsp; of&nbsp; breast&nbsp; feeding .&nbsp; The&nbsp;&nbsp; present&nbsp;&nbsp; investigation&nbsp; is&nbsp;&nbsp; designed&nbsp; to &nbsp;&nbsp;&nbsp; determine&nbsp;&nbsp; the&nbsp;&nbsp; relationship&nbsp; between&nbsp; environmental&nbsp; tobacco&nbsp; smoking &nbsp;&nbsp;&nbsp; (E.T.S) and Breast feeding &nbsp;duration&nbsp; (B.F.D)&nbsp; among women reffered to the &nbsp;&nbsp;&nbsp; health&nbsp;&nbsp; centers&nbsp;&nbsp; supervised&nbsp;&nbsp; by&nbsp;&nbsp; Shaheed&nbsp;&nbsp; Beheshty&nbsp; University&nbsp; of Tehran &nbsp;&nbsp;&nbsp; in 1998. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A cohort&nbsp;&nbsp; study&nbsp; was&nbsp; performed&nbsp; on 70 women which were in a smoky &nbsp;&nbsp;&nbsp; environment during their pregnancy ,&nbsp; Breast&nbsp; feeding ( exposure ), and 70 &nbsp;&nbsp;&nbsp; women which were in a smoke&nbsp; free&nbsp;&nbsp; environment&nbsp; ( Non&nbsp; exposure ). Our &nbsp;&nbsp;&nbsp; exposure&nbsp;&nbsp; and&nbsp;&nbsp; non&nbsp;&nbsp; exposure&nbsp;&nbsp; groups&nbsp;&nbsp; were&nbsp;&nbsp; matched&nbsp;&nbsp; for&nbsp; their age . &nbsp;&nbsp;&nbsp; education , profession and&nbsp; type of&nbsp;&nbsp; delivery.&nbsp;&nbsp; Sampling&nbsp;&nbsp; was&nbsp; based&nbsp;&nbsp; on &nbsp;&nbsp;&nbsp; nonprobablistic method . Relative&nbsp; risk&nbsp; and&nbsp; attributable&nbsp; rate of&nbsp; E.T.S and &nbsp;&nbsp;&nbsp; B.F.D&nbsp; were calculated. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The&nbsp;&nbsp; B.F.D&nbsp;&nbsp; parameter&nbsp;&nbsp; were&nbsp;&nbsp; obtained&nbsp;&nbsp; as&nbsp; 3.91.3&nbsp;&nbsp; in&nbsp; the&nbsp; group of &nbsp;&nbsp;&nbsp; exposuer and 4.81.3 for non exposure&nbsp; group (P<0.001). In&nbsp; the&nbsp; exposure &nbsp;&nbsp;&nbsp; 57% of&nbsp; women had more than 4.5 month of exclusive breast feeding and &nbsp;&nbsp;&nbsp; in non exposure group this was 31% (P<0.001). &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Breast&nbsp;&nbsp; feeding&nbsp;&nbsp; duration&nbsp; is&nbsp; decreased&nbsp; for women being in an smoky &nbsp;&nbsp;&nbsp; environment.