Increased prescriptions for irritable bowel syndrome after the 2018 Japan Floods: a longitudinal analysis based on the Japanese National Database of Health Insurance Claims and Specific Health Checkups

Table 2 Change of prescription for types of IBS-related drugs among pre-disaster users

	Pre-disaster		Post-disaster		Difference between pre- and post-disaster
	Victims (%)	Non-victims (%)	Victims (%)	Non-victims (%)	(Change of victims) − (change of non-victims) (%)
Anticholinergics	0.61	0.77	0.61	0.61	0.11
Gastrointestinal motility modifier	0.47	1.66	0.15	1.23	0.11
Intestinal secretagogue	0.38	0.53	0.23	0.56	− 0.18
Antidiarrheal	2.02	1.68	2.19	1.45	0.4
Probiotics	10.38	9.09	8.54	7.02	0.23
Laxatives	9.59	6.60	11.26	6.27	2
Any concurrent use	8.25	6.80	6.29	5.36	− 0.52
Total	31.70	27.12	29.27	22.51	2.18

The mean prescription rate of IBS-related drugs was compared 1 year before and after the disaster
Difference between pre- and post-disaster was calculated with the difference between change of victims and change of non-victims
IBS irritable bowel syndrome

ISSN: 1471-230X