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1.
Pediatr Nephrol ; 33(8): 1375-1384, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29626242

RESUMO

BACKGROUND: An increase in the incidence of kidney stone disease has been reported for all age groups worldwide. To examine this trend, we conducted a nationwide study of the epidemiology of kidney stones in Icelandic children and adolescents over a 30-year period. METHODS: Computerized databases of all major hospitals and medical imaging centers in Iceland were searched for International Classification of Diseases and radiologic and surgical procedure codes indicative of kidney stones in patients aged < 18 years, followed by a thorough medical record review. Age-adjusted incidence was calculated for the time intervals 1985-1989, 1990-1994, 1995-1999, 2000-2004, 2005-2009, and 2010-2013. Time trends in stone incidence were assessed by Poisson regression. The prevalence of stone disease for the years 1999-2013 was also determined. RESULTS: Almost all the 190 patients (97%) that we identified had symptomatic stones, and acute flank or abdominal pain and hematuria were the most common presenting features. The total annual incidence of kidney stones increased from 3.7/100,000 in the first 5-year interval to 11.0/100,000 during the years 1995-2004 (p < 0.001) and decreased thereafter to 8.7/100,000 in 2010-2013 (p = 0.63). The incidence rise was highest in girls aged 13-17 years, in whom it rose from 9.8/100,000 in 1985-1989 to 39.2/100,000 in 2010-2013 (p < 0.001), resulting in an overall female predominance in this age group. The mean annual prevalence of stone disease in 1999-2013 was 48/100,000 for boys and 52/100,000 for girls. CONCLUSION: We found a significant increase in the incidence of childhood kidney stone disease, driven by a dramatic increase of stone frequency in teenage females which is poorly understood and warrants further study.


Assuntos
Dor Abdominal/epidemiologia , Dor Aguda/epidemiologia , Dor no Flanco/epidemiologia , Hematúria/epidemiologia , Cálculos Renais/epidemiologia , Dor Abdominal/etiologia , Dor Aguda/etiologia , Adolescente , Criança , Pré-Escolar , Feminino , Dor no Flanco/etiologia , Hematúria/etiologia , Humanos , Islândia/epidemiologia , Incidência , Cálculos Renais/complicações , Masculino , Prevalência , Estudos Retrospectivos , Fatores de Risco , Fatores Sexuais
2.
Urolithiasis ; 48(5): 409-417, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32107578

RESUMO

OBJECTIVES: To examine the stone recurrence rate among childhood kidney stone formers in the Icelandic population. MATERIALS AND METHODS: We retrospectively examined kidney stone recurrence in a recently reported population-based sample of 190 individuals who experienced their first stone before 18 years of age in the period 1985-2013. Of these 190 individuals, 112 (59%) were females and the median (range) age at the incident stone diagnosis was 15.0 (0.2-17.9) years. Stone recurrence was defined as an acute symptomatic episode with imaging confirmation or self-reported stone passage, new stone detected by imaging in asymptomatic patients, and suspected clinical stone episode without verification. The Kaplan-Meier method was used to assess stone-free survival and the Chi-square, Fisher's exact, Wilcoxon rank-sum and the log-rank tests to compare groups. RESULTS: A total of 68 (35%) individuals experienced a second stone event, 1.7 (0.9-18.9) years after the initial diagnosis. The recurrence rate was 26%, 35%, 41% and 46% after 5, 10, 15 and 20 years of follow-up, respectively. The 5-year recurrence rate increased with time and was 9%, 24% and 37% in the periods 1985-1994, 1995-2004 and 2005-2013, respectively (P = 0.005). No difference in stone recurrence was observed between the sexes (P = 0.23). CONCLUSIONS: In our population-based sample of childhood kidney stone formers, the stone recurrence rate is similar to that reported for adults. The observed rise in stone recurrence with time may be related to closer patient follow-up in recent years or increased stone risk in general.


Assuntos
Cálculos Renais/epidemiologia , Adolescente , Criança , Pré-Escolar , Feminino , Seguimentos , Humanos , Islândia/epidemiologia , Lactente , Masculino , Recidiva , Estudos Retrospectivos , Fatores de Tempo
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