Table 1.

Change in BIC values as the number of normal distributions in the mixture increases from one to six for 2009 H1N1, for the aggregated data as well as the individual collection sites.

		ALL SITES	HUE	KHANH HOA	HCMC	DAK LAK
		(N = 19335)	(N = 4390)	(N = 5053)	(N = 5753)	(N = 4139)
SumNegLLH, single component		71504.04	15812.88	18726.69	21496.01	15432.06
change in number of components	1 to 2	−826.40	−170.79	−182.44	−215.33	−208.86
	2 to 3	−410.07	−74.55	−79.83	−137.95	−131.34
	3 to 4	−318.12	−66.76	−56.37	−77.14	−32.68
	4 to 5	−19.87	−18.32	8.68	16.82	6.10
	5 to 6	−27.42	2.13	24.23	9.57	−2.59

The values of the negative sum of the log likelihood were weighted to adjust for age and gender according to the Vietnam national housing census in 2009. The first row shows the exact values of sum of the negative log-likelihoods (SumNegLLH).