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Trends in urinary stone composition in 23,182 stone analyses from 2011 to 2019: a high-volume center study in China

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A Letter to the Editor to this article was published on 15 April 2021

Abstract

Purpose

To evaluate the distribution and dynamic trends in constituents of urinary stones in China.

Materials and methods

The composition of 23,182 stones were analyzed and then recorded between January 2011 and December 2019. The characteristics in terms of stone patient’s gender, age and calendar year were analyzed.

Results

Most stones (22,172, 95.64%) had several crystal components, among which 40.25% (8925/22,172) were mixtures with infection components. Calcium oxalate (CaOx) and uric acid (UA) stones were more commonly encountered in men, but calcium phosphate (CaP), magnesium ammonium phosphate (MAP) and carbonate apatite (CA) stones were more prevalent in women (p < 0.05). In males, the proportion of CaOx stones increased up to the age of 40, but subsequently decreased (p < 0.001). Interestingly, females showed an inverse trend regarding CaOx stones (p < 0.001). The proportion of UA stones increased with age (p < 0.001), and CA stones most frequently were recorded at age 20–49. Over the past 9 years, UA, CA, and MAP stones increased over time, whereas there was a tendency for CaOx stones to decrease (p < 0.05).

Conclusions

The scarcity of pure stones and a certain proportion of mixtures with infection stone components (e.g., mixtures of CaOx and CA) suggest that treatment directed against a single stone component is insufficient for effective recurrence prevention. Age and gender were significant determinants of stone composition, and according to the observed chronological trends, it seems that in the future, more UA, CA and MAP stones and fewer CaOx stones may be encountered in the studied population.

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Funding

Grants from the National Natural Science Foundation, China (No. 82070719); Natural Science Foundation of Guangdong Province (No. 2020A151501198); Key Project of Basic Research and Applied Basic Research of Department of Education of Guangdong Province, China (No. 2018KZDXM056). Science and Technology Program of GuangZhou, China (No. 202002030042).

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Authors

Contributions

WQW and GHZ: project development; ZCH and LLO: data collection; SKZ, YPH and WZW: data analysis and manuscript writing; H-GT and WQW: manuscript editing. All the authors approved and contributed to the final manuscript.

Corresponding authors

Correspondence to Guohua Zeng or Wenqi Wu.

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The authors declare that they have no conflicts of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Zhang, S., Huang, Y., Wu, W. et al. Trends in urinary stone composition in 23,182 stone analyses from 2011 to 2019: a high-volume center study in China. World J Urol 39, 3599–3605 (2021). https://doi.org/10.1007/s00345-021-03680-y

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  • DOI: https://doi.org/10.1007/s00345-021-03680-y

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