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The impact of daytime diuresis on voiding frequency and incontinence classification in children.
J Urol. 2008 Jun; 179(6):2384-8.JU

Abstract

PURPOSE

Daytime voiding frequency is an important criterion in the classification of childhood incontinence. The aim of this study was to assess the relative impact of diuresis and bladder capacity on voiding frequency.

MATERIALS AND METHODS

We analyzed data from 570 children 4 to 15 years old (median age 8.3 +/- 2.0 years) treated for urinary incontinence at a secondary referral center, and 87 healthy controls. Based on frequency-volume charts, daytime voiding frequency, age adjusted maximum voided volume, daytime diuresis and fluid intake were calculated. Children were classified according to voiding frequency into 3 groups-decreased (fewer than 3 voids daily), normal (3 to 7) and increased voiding frequency (more than 7).

RESULTS

A total of 219 children had monosymptomatic enuresis, while 351 children presented with daytime symptoms. In children with daytime symptoms we found a significant difference between voiding frequency groups regarding daytime diuresis (decreased voiding frequency 12.3 +/- 4.1 ml/kg, normal 18.7 +/- 6.0 ml/kg, increased 31.1 +/- 9.8 ml/kg, p <0.001). In contrast, maximum voided volume observed/expected bladder capacity for age did not differ significantly between normal and increased frequency groups (72% +/- 25% vs 74% +/- 23%), compared to patients with decreased voiding frequency (89% +/- 30%, p <0.01). Also, in healthy children we found a positive correlation between voiding frequency and daytime diuresis, whereas maximum voided volume observed/expected bladder capacity for age did not correlate with voiding frequency. Furthermore, we observed a significant positive correlation between fluid intake and diuresis (r = 0.53, p <0.001).

CONCLUSIONS

In healthy controls and children with incontinence daytime voiding frequency depends mainly on diuresis, and seems less influenced by bladder capacity. Diuresis should be taken into consideration when evaluating voiding frequency from frequency-volume charts in children.

Authors+Show Affiliations

Clinical Institute, University of Aarhus, Aarhus, Denmark. mahler@ki.au.dkNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18433779

Citation

Mahler, Birgitte, et al. "The Impact of Daytime Diuresis On Voiding Frequency and Incontinence Classification in Children." The Journal of Urology, vol. 179, no. 6, 2008, pp. 2384-8.
Mahler B, Hagstroem S, Rittig N, et al. The impact of daytime diuresis on voiding frequency and incontinence classification in children. J Urol. 2008;179(6):2384-8.
Mahler, B., Hagstroem, S., Rittig, N., Mikkelsen, M. M., Rittig, S., & Djurhuus, J. C. (2008). The impact of daytime diuresis on voiding frequency and incontinence classification in children. The Journal of Urology, 179(6), 2384-8. https://doi.org/10.1016/j.juro.2008.01.168
Mahler B, et al. The Impact of Daytime Diuresis On Voiding Frequency and Incontinence Classification in Children. J Urol. 2008;179(6):2384-8. PubMed PMID: 18433779.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The impact of daytime diuresis on voiding frequency and incontinence classification in children. AU - Mahler,Birgitte, AU - Hagstroem,Soren, AU - Rittig,Nikolaj, AU - Mikkelsen,Mette Marie, AU - Rittig,Soren, AU - Djurhuus,Jens Christian, Y1 - 2008/04/23/ PY - 2007/10/05/received PY - 2008/4/25/pubmed PY - 2008/6/3/medline PY - 2008/4/25/entrez SP - 2384 EP - 8 JF - The Journal of urology JO - J Urol VL - 179 IS - 6 N2 - PURPOSE: Daytime voiding frequency is an important criterion in the classification of childhood incontinence. The aim of this study was to assess the relative impact of diuresis and bladder capacity on voiding frequency. MATERIALS AND METHODS: We analyzed data from 570 children 4 to 15 years old (median age 8.3 +/- 2.0 years) treated for urinary incontinence at a secondary referral center, and 87 healthy controls. Based on frequency-volume charts, daytime voiding frequency, age adjusted maximum voided volume, daytime diuresis and fluid intake were calculated. Children were classified according to voiding frequency into 3 groups-decreased (fewer than 3 voids daily), normal (3 to 7) and increased voiding frequency (more than 7). RESULTS: A total of 219 children had monosymptomatic enuresis, while 351 children presented with daytime symptoms. In children with daytime symptoms we found a significant difference between voiding frequency groups regarding daytime diuresis (decreased voiding frequency 12.3 +/- 4.1 ml/kg, normal 18.7 +/- 6.0 ml/kg, increased 31.1 +/- 9.8 ml/kg, p <0.001). In contrast, maximum voided volume observed/expected bladder capacity for age did not differ significantly between normal and increased frequency groups (72% +/- 25% vs 74% +/- 23%), compared to patients with decreased voiding frequency (89% +/- 30%, p <0.01). Also, in healthy children we found a positive correlation between voiding frequency and daytime diuresis, whereas maximum voided volume observed/expected bladder capacity for age did not correlate with voiding frequency. Furthermore, we observed a significant positive correlation between fluid intake and diuresis (r = 0.53, p <0.001). CONCLUSIONS: In healthy controls and children with incontinence daytime voiding frequency depends mainly on diuresis, and seems less influenced by bladder capacity. Diuresis should be taken into consideration when evaluating voiding frequency from frequency-volume charts in children. SN - 1527-3792 UR - https://www.unboundmedicine.com/medline/citation/18433779/The_impact_of_daytime_diuresis_on_voiding_frequency_and_incontinence_classification_in_children_ L2 - https://www.jurology.com/doi/10.1016/j.juro.2008.01.168?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -