Be Kind to Your Behind: A Systematic Review of the Habitual Use of Bidets in Benign Perianal Disease

Table 2

Odds of developing pruritus ani with hemorrhoids after habitual bidet use.

Study	Study type	N	Comparison		Outcome extracted	Odds ratio of pruritus
			Intervention group	Comparator group		M	F
Kiuchi et al. [14]	Prospective cohort	7,637	Using bidet at least once/day	Using bidet less than once/week	Odds of developing pruritus at 1 year	1.267 (0.958–1.681)	1.021 (0.80–1.345)
Asakura et al. [15]	Prospective cohort	7,637	Using bidet at least once/day	Using bidet less than once/week	Odds of developing pruritus at 3 years	1.36 (1.067–1.75)	1.14 (0.89–1.46)
Tsunoda et al. [16]	Cross-sectional survey	2,300	Using bidet twice or more a day	Using bidet less than twice a day	Correlation of pruritus ani with increased frequency of bidet use	1.68 (1.15–2.36)	N/A

The asterisk implies significance at P < 0.05.