A new nomogram of urinary flow rate and volume based on multiple measurements per healthy adult Japanese men using a portable uroflowmeter (P-Flowdiary®)

Table 3 Maximum flow rates with a voided volume > 150 mL

Age group (years)	Frequency	Maximum flow rate (mL/s), mean ± SD	95% Confidence interval
20–29	179	24.14 ± 4.94***	23.41–24.87
30–39	143	24.05 ± 6.99**	22.90–25.21
40–49	158	24.64 ± 5.72****	23.74–25.54
50–59	177	21.8 ± 5.05	21.05–22.55
Total	657	23.61 ± 5.76	23.17–24.05

Data are described as mean ± standard deviation
Ordinary 1-way analysis of variance and Dunnett’s multiple comparison test were used
^**P < 0.01, ***P < 0.001, ****P < 0.0001: compared with the 50–59-year age group

ISSN: 1471-2490