Association between malaria control and paediatric blood transfusions in rural Zambia: an interrupted time-series analysis

Table 7 Association between paediatric outpatient malaria visits and paediatric malaria admissions

	Dependent variable: paediatric malaria admissions		Dependent variable: paediatric admissions for severe malarial anaemia
	(1)	(2)	(3)	(4)
Paediatric outpatient malaria visits	0.30***	0.31***	0.05***	0.05***
	(0.04)	(0.06)	(0.01)	(0.01)
Paediatric outpatient malaria visits X period 2004-2008		0.13		0.06**
		(0.11)		(0.03)
Period 2004–2008 (dummy variable)		−11.80		−3.10
		(27.09)		(7.81)
Constant	5.77	9.28	2.43	2.14
	(8.29)	(24.67)	(3.06)	(8.29)
Observations	66	66	66	66
Mean of dependent variable	56.00	56.00	9.14	9.14
Wald Chi-Squared	1.31e + 11	1.38e + 12	161.61	594.00

*Significant at 10%; **significant at 5%; ***significant at 1%. Coefficient standard errors are noted in parentheses.
Regressions use an autoregressive-moving-average model with 2 lags and robust standard errors. We control for the month of the year in all regressions to account for seasonal correlations. Period 2004–2008 variable is a dummy variable that takes on a value of 1 for the years 2004–2008, and 0 otherwise.