Obesity

Patterns of weight change during adulthood and incidence of nephrolithiasis: a population-based study

Int J Obes (Lond)Published Population-based cross-sectional study

Authors' conclusion

This study found that changes in weight during adulthood are linked to the risk of developing kidney stones. Maintaining healthy weight during adulthood is important for reducing the risk of developing kidney stones.

Study context

Population
Participants aged 30–75 years with body mass index (BMI) recorded at baseline and 10 years prior to the survey
Participants
14,472 participants
Exposure
Adult weight change patterns vs stable healthy weight
Outcome
Incident kidney stone
Methodological detailslogistic regression adjusted for covariates, restricted cubic spline regression, population attributable fraction
  • Logistic regression adjusted for covariates
  • Restricted cubic spline regression
  • Population attributable fraction

Main finding

As reported in the abstract

Kidney stone
Each group vs stable healthyOdds ratio (95% CI)
Non-obesity to obesity
1.59(1.18–2.13)
Obesity to non-obesity
1.78(1.47–2.16)
Stable obesity
1.80(1.48–2.19)

Observational data: associations, not effects.

Further findings

Absolute weight change and kidney stone (restricted cubic spline (RCS))

U-shaped association; risk lowest with stable healthy BMI

Population attributable fraction (PAF) of maintaining healthy BMI

Lower incidence of kidney stones if population had maintained healthy BMI
28.7% (95% CI: 18.6%-37.5%)

Original publication

Patterns of weight change during adulthood and incidence of nephrolithiasis: a population-based study. Int J Obes (Lond). Published 9 December 2023. doi:10.1038/s41366-023-01434-x

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