Table 2.

Regional average root mean square error of predictions over the 20 week validation period under four scenarios for continuing collection of prevalence data to provide prevalence estimates at a coarse spatial and/or temporal resolution as input to the data integration model.

Region	Regional weekly	National weekly	Regional 1 in 5 weeks	National 1 in 5 weeks
East Midlands	0.187	0.237	0.345	0.374
East of England	0.188	0.229	0.324	0.345
London	0.168	0.264	0.249	0.308
North East	0.141	0.340	0.391	0.538
North West	0.250	0.314	0.395	0.468
South East	0.208	0.287	0.289	0.271
South West	0.198	0.294	0.286	0.388
West Midlands	0.209	0.230	0.330	0.367
Yorkshire and the Humber	0.245	0.262	0.366	0.407