Table 3. Incidence rate of overall IID in the telephone survey by recall period and country.

Estimates are standardised by age and sex according to the UK census population and they are adjusted taking into account different size of the populations in each UK country, prevalence of non-infectious diarrhoea in the population, proportion of time spent outside the UK, and number of interviews completed each month.

	7-day recall		28-day recall
Country	Rate	(95% CI)	Rate	(95% CI)
England	1,463	(994–2,247)	449	(280–767)
Northern Ireland	1,270	(932–1,775)	802	(513–1325)
Scotland	2,053	(1,444–3,020)	1,196	(756–2,007)
Wales	2,066	(1,579–2,759)	662	(398–1,184)