Table 2. Subgroup analysis on the outcomes of urine alkalization by gender and BMI.

	Baseline urine pH	Alkalized urine pH	AGU-pH	P value
Gender
Male	6.12±0.39	6.50±0.34	0.57±0.15	<0.001***
Female	6.22±0.53	6.50±0.43	0.50±0.15	0.0575
BMI
≥25	6.02±0.40	6.52±0.44	0.51 ±0.14	0.0086**
18.5–25	6.27±0.45	6.51±0.37	0.57±0.16	0.0042**
<18.5	6.04±0.32	6.43±0.28	0.51±0.14	0.0094**
Overall	5.98±0.28	6.52±0.29		<0.001***

Data were presented as mean ± SD and processed by paired t-tests. There was no significant difference in alkalized urine pH between males and females, or across all BMI subgroups (P>0.05). **, P<0.01; ***, P<0.001. SD, standard deviation; BMI, body mass index; AGU-pH, alkalization gains in urine pH.