Table 5.

t-test of the difference between observed and predicted mean annual any OI prevalence in the validation period (2011–2013)

Year	Observed		Predicted		t-test
	Mean annual any OI prevalence	SD	Mean annual any OI prevalence	SD
2010	36.61	2.25	36.39	0.923	t = 1.5421, p = 0.151
2011	35.89	2.83	36.12	1.501	t = −0.620, p = 0.547
2012	34.16	3.52	34.21	1.404	t = −0.035, p = 0.973
2013	27.53	2.15	27.84	1.601	t = −0.519, p = 0.614