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【目的】探讨宁强县6～24月龄婴幼儿营养干预效果与干预周期的关系。【方法】按照干预措施实施的时限将婴幼儿分组,分别比较不同时限干预组与未干预组婴幼儿的年龄别体重Z评分(Weight-for-age Z-score,WAZ)、年龄别身长Z评分(Height-for-age Z-score,HAZ)、身高别体重Z评分(Weight-for-Height Z-score,WHZ)以及血红蛋白的差异。【结果】干预0～2.9月组、3～5.9月组和6～8.9月组的WAZ分别为0.37±1.25、0.07±0.97、0.07±1.02,与未干预组相比差异存在统计学意义(P<0.01);干预0～2.9月组、3～5.9月组和6～8.9月组的WHZ分别为0.55±1.11、0.43±1.00、0.32±1.26,较未干预组有显著增加(P<0.01);干预0～2.9月组(P<0.01)、6～8.9月组(P<0.05)的HAZ较未干预组显著增加。【结论】通过营养干预可以显著改善宁强县6～24月龄婴幼儿营养状况,本研究存在“0～9个月”的敏感干预周期。
【Objective】 To investigate the relationship between nutritional intervention and interventional cycle in infants and young children aged 6 ~ 24 months in Ningqiang County. 【Methods】 Infants were divided into groups according to the time limit of interventions, and the scores of weight-for-age Z-score (WAZ), age-specific length Z score (Height-for-age Z-score, HAZ), weight-for-height Z-score (WHZ) and hemoglobin. 【Results】 The WAZ of 0-9. 9 months group, 3 ~ 5.9 months group and 6 ~ 8. 9 months intervention group were 0.37 ± 1.25,0.07 ± 0.97,0.07 ± 1.02, respectively, there was significant difference as compared with the non-intervention group (P <0.01). The WHZ of 0.5-9 ± 0.11, 0.43 ± 1.00 and 0.32 ± 1.26 in 0-9.9 months group, 3-5.9 months group and 6-8.8 months intervention group were significantly higher than those in the non-intervention group (P <0.01) (P <0.01). The HAZ in the 6-8.8 month group (P <0.05) increased significantly compared with that in the non-intervention group. 【Conclusion】 Nutritional intervention can significantly improve nutritional status of infants and young children aged 6 ~ 24 months in Ningqiang County. There is a “0 ~ 9 months” sensitive intervention period in this study.