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目的:了解马鞍山城区6月龄婴儿骨矿发育情况及影响因素。方法:根据知情同意原则,在某妇幼保健院儿童保健门诊对2012年出生的1 366名婴儿进行人体测量、问诊和骨密度(BMD)测量,包括测量婴儿身长、体重,询问过去24 h的喂养情况,采用定量超声技术测量6月龄时胫骨BMD,BMD Z值≤-1.0为BMD不足。结果:马鞍山城区6月龄婴儿BMD不足的检出率为22.62%;男童及女童BMD SOS值比较差异无统计学意义(t=0.538,P=0.591);纯母乳喂养、混合喂养及人工喂养婴儿的BMD SOS值比较差异有统计学意义(F=15.212,P<0.05),其中以人工喂养最高;纯母乳喂养和混合喂养的婴儿SOS值与6月龄婴儿的Kaup指数Spearman等级相关系数分别为-0.140和-0.169,差异均有统计学意义(P<0.05)。结论:马鞍山城区6月龄婴儿BMD不足的检出率较高,且母乳喂养时婴儿的体重增速越快,Kaup指数越大,越易发生BMD不足。
Objective: To understand the bone mineral development of 6-month-old infants in Ma’anshan city and its influencing factors. Methods: In accordance with the principle of informed consent, a total of 1 366 infants born in 2012 in a maternal and child care clinic were surveyed for body measurement, interrogation and bone mineral density (BMD) measurements. The measurements included body length, weight, Feeding conditions, using quantitative ultrasound technology to measure tibial BMD at 6 months of age, BMD Z value ≤ -1.0 for BMD deficiency. Results: The prevalence of BMD deficiency in 6-month-old infants in downtown Ma’anshan was 22.62%. There was no significant difference in SOS between boys and girls (t = 0.538, P = 0.591); exclusive breastfeeding, mixed feeding and artificial feeding The SOS of BMD in infants was significantly different (F = 15.212, P <0.05), and the highest was in artificial feeding. Spearman rank correlation coefficient between infants fed exclusive breastfeeding and mixed feeding and Kaup index of 6-month-old infants -0.140 and -0.169, the difference was statistically significant (P <0.05). Conclusion: The prevalence of BMD deficiency in 6-month-old infants in Ma’anshan urban area is high, and the weight gain of infants during breastfeeding is higher. The larger the Kaup index, the more susceptible to BMD.