Robertson W G, Gallagher J C, Marshall D H, Peacock M, Nordin B E
Br Med J. 1974 Nov 23;4(5942):436-7. doi: 10.1136/bmj.4.5942.436.
A retrospective study over a three-year period has shown a noticeable seasonal variation in the daily urinary excretion of calcium in healthy men, healthy women, and men prone to form stones. This reached a maximum in July or August and a minimum in December or January in all three groups. For any given month the stone formers had higher urinary calcium values than healthy men, who, in turn, had higher values than healthy women.
一项为期三年的回顾性研究表明，健康男性、健康女性以及易患结石的男性的每日尿钙排泄量存在明显的季节性变化。在所有这三组人群中，尿钙排泄量在7月或8月达到最高值，在12月或1月达到最低值。对于任何给定月份，结石患者的尿钙值高于健康男性，而健康男性的尿钙值又高于健康女性。
