目標：物質使用及受虐是公認危害母體及胎兒之危險因子，但甚少受到醫療工作人員的關注，為協助婦女保健工作之推展，本研究係以問卷資料訪談評估不同種族婦女於懷孕期間物質使用及受虐經驗對嬰兒出生體重之影響。 方法：本研究於2000年11月至2001年8月間共收集臺東地區481位婦女懷孕時的資料，其中原住民112人，和漢族共369人，研究工具包括物質使用評估表、受虐問卷表及人口學資料。 結果：原住民婦女在懷孕期間之吸菸、飲酒、嚼檳榔的比率顯著高於漢族，但在藥物濫用的比率則無顯著差異。懷孕期間家庭或婚姻暴力的發生率及受傷害程度均以原住民婦女較高 (P＜0.001)。嬰兒平均出生體重與母親懷孕期間是否受虐無統計上顯著差異，但發現懷孕期間有吸菸或嚼檳榔者其所生的嬰兒出生體重顯著較未使用低 (P＜0.05)。 結論：原住民婦女之產前照護應加強暸解物質使用對母體及胎兒的不利影響，期待本研究結果能做為婦幼保健工作的參考；另物質使用與許多疾病有相關性，對健康的危害是不爭的事實，務必加強防制，以維國民之健康。

Objectives: Substance use and physical abuse during pregnancy are known health problems that detrimentally affect maternal health and birth outcomes; however, many health professionals pay little attention to these problems. The aims of this study were to estimate the prevalence of substance use and physical abuse during pregnancy in different ethnic groups and to explore the effects on birth weight. Methods: A total of 481 pregnant women from the Taitung area, including 112 aboriginal and 369 Fukien-Taiwanese women, were recruited between November 2000 and August 2001. A substance use questionnaire, an abuse assessment screening questionnaire, and socio-demographic data were used in the analysis. Results: The prevalence of substance use in aboriginal women during pregnancy was significantly higher than in Fukien-Taiwanese women. There was also a significantly higher rate of physical abuse in aboriginal women (p<0.001). We determined that the birth weight was significantly lower in newborns of mothers who smoked cigarettes or chewed betel quid during pregnancy (p<0.05), but there was no significant association between birth weight and physical abuse. Conclusions: The findings of this study increases knowledge about substance use and physical abuse in pregnant women and provides an incentive to promote maternal and infant health care in the community, especially in aboriginal women.