Objective:

To determine the uroflowmetric parameters in healthy men with no urinary symptoms and associate them with anthropometric measurements to establish normality limits in Mexico.

Materials and methods:

A prospective, descriptive, and analytic study was conducted on men under 40 years of age with no urinary symptoms or instrumentation. Anthropometric parameters were measured and three uroflowmetry studies were carried out for each individual. Periodic calibration of the uroflowmeter (Mediwatch© disk) and other good urodynamic practices were performed to obtain more accurate results. The results were analyzed through descriptive statistics (measures of central tendency, standard deviation) and inferential statistics (contingency tables, X2), to establish statistically significant associations.

Results:

Seventy-seven men were included in the study with the following values expressed in means: age 25.9 years (SD ± 6.18), weight 78.9 kg (SD ± 14.4), height 172 cm (SD ± 6.3), BMI 26.8 kg/m2 (SD ± 4.64), abdominal circumference 93 cm (SD ± 11.8), Qmax 28.01 mL/sec (SD ± 8.12), voided volume 313 mL (DE ± 94.98), time 27.19 seconds (SD ± 7.6). The subgroup analysis, eliminating the interquartile range and comparing the more obese group versus the thinner group (BMI) produced a Qmax of 27.9 vs 31.03 (X2 = -0.434, p>0.05); the abdominal circumference comparison produced 28.8 vs 25.31 mL/sec for the thinner patients and the more obese patients, respectively (X2 = 2.901, p>0.05). There was a decrease of 1.68 mL/sec in the Qmax after a decade.

Conclusions:

Mexican men have a flow rate of 28 mL/sec, with a decrease of 1.68 mL/sec for each decade of life. Even if overweight does not affect urine stream force, it has a tendency to be stronger in the obese population.

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