Department of Urology, King Abdulaziz University Hospital, Jeddah, Saudi Arabia.
Urology. 2012 Nov;80(5):974-7. doi: 10.1016/j.urology.2012.07.027. Epub 2012 Sep 16.
To examine the relationship between the body mass index and the size of renal stones in a group of patients with urolithiasis.
One-hundred seventy-three patients with renal stones were enrolled. Body mass index was calculated on the basis of height and weight measurements, and stone size was either measured accurately (143 patients) or estimated by the radiologist or managing urologist (30 patients). Body mass index and stone size were then cross-tabulated and the results were analyzed.
Patients with a body mass index of ≥ 25 kg/m(2) (overweight or obese) were found to have 29 (16.8%) small, 84 (48.5%) medium, and 25 (14.5%) large stones, whereas patients in the underweight or normal body mass index categories had 7 (9.5%) small, 19 (10.9%) medium, and 9 (10.6%) large stones. Of the study group, 109/173 (63%) were found to be overweight or obese, of whom all had renal stones ≥ 1 cm, ie, medium or large, when measured at the greatest diameter, indicating a tendency to have larger stones with increasing body mass index that was statistically significant (P = .0001).
A clear relationship exists between increased body mass index and renal stone size, with overweight and obese patients having medium and large stones more frequently than patients with underweight or normal body mass index.
研究一组尿路结石患者的体重指数与肾结石大小之间的关系。
共纳入 173 例肾结石患者。根据身高和体重测量值计算体重指数，结石大小通过精确测量（143 例）或放射科医生或主治泌尿科医生估计（30 例）。然后对体重指数和结石大小进行交叉制表，并分析结果。
体重指数≥25kg/m2（超重或肥胖）的患者中，小结石 29 例（16.8%），中结石 84 例（48.5%），大结石 25 例（14.5%）；而体重指数偏低或正常的患者中，小结石 7 例（9.5%），中结石 19 例（10.9%），大结石 9 例（10.6%）。在研究组中，109/173（63%）例超重或肥胖，他们的肾结石最大直径均≥1cm，即中或大结石，表明体重指数增加与肾结石大小之间存在明显的相关性，且具有统计学意义（P=0.0001）。
体重指数与肾结石大小之间存在明确的关系，超重和肥胖患者的中、大结石比体重指数偏低或正常的患者更为常见。
