. 2019 Feb 20;33:8. doi: 10.34171/mjiri.33.8

Table 6. The relationship between water and tea consumption with frequency of spontaneous stone expulsion duration 1 year .

Type of drink		Frequency of spontaneous stone expulsion dura-tion 1 year	p
		Mean ± standard deviation
Consumed water	Mineral water (n=1)	2.5 ± 1.5	0.81^a
	Purified water (n=1)	2.63 ± 1.36
	ordinary (Pipe) water (n=8)	2.95 ± 2.67
Consumed tea	Light tea (n=43)	2.72 ± 2.1	0.63^b
	Heavy tea (n=67)	2.95 ± 2.61

P< 0.05 was considered significant.

a. One way Anova, b. Independent t – test