Table 3. Urine pH values in volunteers with and without effective urine alkalization.

Effective urine alkalization	Baseline urine pH	Alkalized urine pH	n
Yes	5.94±0.27	6.52±0.28	62
No	6.22±0.22	6.58±0.34	11
P value	0.0016**	0.5555

Data were presented as mean ± SD and processed by t-tests. **, P<0.01. SD, standard deviation.