作者在1977年7月至1978年4月的10个月期间对44例随机选择的疑为下呼吸道感染1岁以下婴儿研究是否存在亚临床型佝偻病。这些婴儿中没有1例具明显的临床症候,虽然8例有轻度颅骨软化,但其中7例年龄小于6个月。检查内容包括双侧腕部与胸部X线的检查资料,血清钙、磷、碱性磷酸酶和25-羟D浓度以及临床有关佝偻病体征的检查等。 The authors studied the presence or absence of subclinical rickets in 44 randomly selected infants under 1 year of age with suspected lower respiratory tract infection during the 10-month period from July 1977 to April 1978. None of these infants had significant clinical symptoms, and although eight had mild skull softening, seven were younger than six months. Check the contents of bilateral wrist and chest X-ray examination of information, serum calcium, phosphorus, alkaline phosphatase and 25-hydroxy D concentration and clinical signs of rickets and other signs of inspection.