Table 1. Trends in irritable bowel syndrome (IBS) incidence rates in Taiwanese adults during 2003–2013 (N = 7 634 281).

Incidence rate	Incidence per 10 000 person-y
	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	Change (%)
Crude	53.83	56.86	52.62	53.00	53.90	47.95	49.41	47.89	46.97	48.66	47.08	−12.53
Male	50.23	53.91	49.15	50.34	52.30	45.94	46.99	43.93	43.20	46.40	43.94	−12.52
Female	57.23	59.66	55.90	55.53	55.40	49.83	51.69	51.62	50.50	50.78	50.04	−12.58
Adjusted a	56.28	58.19	53.38	53.43	53.42	47.10	48.14	46.24	44.62	45.89	44.56	−20.81
Male	52.05	55.03	49.61	50.71	51.26	44.90	45.48	42.07	40.55	43.48	41.28	−20.69
Female	60.05	61.14	56.90	56.03	55.37	49.22	50.72	50.22	48.41	48.23	47.67	−20.61

Change (%): percentage of changes in the incidence and prevalence rates of IBS between 2003 and 2013.

^a Age-adjusted based on the World Health Organization 2000 standard population.