Table 6.

Persistence of the 2009 Effects of H1N1 Prevalence on Intestinal Infections (A00-A09X) for Children Under Five: 2006–2012.

	(1)	(2)	(3)	(4)
H1N1	−0.046	0.068
	(0.030)	(0.042)
p-value	0.185	0.138
H1N1_2009		−0.221		−0.195
		(0.058)		(0.067)
p-value		0.024		0.075
H1N1*2009			−0.045	0.056
			(0.030)	(0.045)
p-value			0.156	0.241
H1N1*2010			−0.533	−0.109
			(0.305)	(0.332)
p-value			0.050	0.614
H1N1*2011			−0.614	−0.270
			(2.201)	(2.152)
p-value			0.644	0.749
H1N1*2012			0.455	0.265
			(0.392)	(0.388)
p-value			0.379	0.539
R2	0.781	0.799	0.789	0.800
Mean$\left({\displaystyle \overline{Y}}\right)$	1,075	1,075	1,075	1,075
Observations	224	224	224	224
State Trends	Yes	Yes	Yes	Yes

Notes: The period of analysis is 2006–2012. All specifications include time and state fixed effects. The dependent variable is the annual number of hospital discharges where the primary diagnosis was International Classification of Diseases (ICD-10) codes A00-A09X (Intestinal Infections) for children under the age of 5. H1N1 is equal to the number of confirmed H1N1 cases in 2009–2012, and zero for 2006–2008. H1N1_2009 is defined as the number of confirmed H1N1 cases that occurred in 2009 for years 2009–2012 and zero for years 2006–2008. H1N1*2009, H1N1*2010, H1N1*2011, and H1N1*2012 denote the interaction of H1N1 and a dummy variable for 2009, 2010, 2011, and 2012, respectively. p-value denotes the p-value of wild bootstrapped standard errors for each of the specification to correct for small number (32) of clusters. Mean $\left({\displaystyle \overline{Y}}\right)$ denotes the mean of the dependent variable for each specification. State Trends denote state-specific linear trends.