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目的:描述青岛地区1987~2002年双生子出生比的三间分布特征。方法:活产新生儿及双生子信息均来自青岛市疾病控制中心计划免疫登记系统,对双生子出生比进行描述性分析。结果:青岛地区1987~2002年双生子出生比呈现上升趋势,由1987年的1 86‰增至2002年的5 07‰,总体双生子出生比为3 51‰,秋冬季高于春夏季。各地区双生子出生比存在差异,最高的黄岛区为5 78‰,城市高于农村,沿海地区高于非沿海地区。结论:青岛地区1987~2002年双生子出生比呈现上升趋势,有明显季节和地区分布差异。
Objective: To describe the three distribution characteristics of the birth ratio of twins from 1987 to 2002 in Qingdao. Methods: Liveborn newborns and their twins all received information from the Qingdao City Center for Disease Control and Planned Immunization Registration System. A descriptive analysis was performed on twin births. Results: The birth ratio of twins in Qingdao from 1987 to 2002 showed an upward trend, from 186 in 1987 to 507 in 2002. The birth rate of twins was 3,51‰ in total, and it was higher in autumn and winter than in spring and summer. The birth ratio of twins varies from region to region, with the highest Huangdao District being 5,78%. The city is higher than the rural area, and the coastal area is higher than the non-coastal area. Conclusion: The birth ratio of twins in Qingdao from 1987 to 2002 showed an upward trend, with obvious seasonal and regional distribution differences.