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Nonvoiding contraction (NVC) results from cystometry. NVC onset threshold bladder pressure decreased, and bladder wall stress function (pressure-volume product) at NVC onset increases with age. NVC frequency also decreased with age. Total NVC count during filling did not differ among groups. Bars show means ± SE. ANOVA was used where noted; otherwise, a Kruskal-Wallace test was performed. 3P < 0.05 vs. Old. 4P < 0.05 vs. Oldest-old. P for linear trend is reported where applicable.
