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Table 5 Association between malaria control scale-up over time and paediatric blood transfusions - interrupted time series

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

  Dependent variable: paediatric blood transfusions
  (1) (2)
Monthly trend 2000-2003 −0.60*** −0.52***
  (0.12) (0.10)
Difference in monthly use 2004–2008 (relative to 2000–2003) −10.58***  
  (3.35)  
Monthly trend 2004-2008 −0.02  
  (0.04)  
Difference in monthly use 2004–2006 (relative to 2000–2003)   −19.06***
   (3.56)
Monthly trend 2004-2006   0.34***
   (0.10)
Difference in monthly use 2007–2008 (relative to 2000–2003)   −27.47***
   (6.56)
Monthly trend 2007-2008   −0.14
   (0.22)
February 5.79 4.88
  (4.53) (4.70)
March 15.00 13.96
  (9.64) (9.86)
April 26.99* 26.43*
  (14.34) (13.81)
May 18.69 18.87
  (13.41) (12.64)
June −9.22 −8.40
  (11.51) (11.79)
July −16.37 −15.30
  (10.70) (11.78)
August −20.81** −20.01*
  (10.22) (11.76)
September −23.94** −23.87**
  (9.84) (11.26)
October −24.08*** −24.90**
  (8.96) (9.95)
November −24.54*** −26.06***
  (7.47) (8.03)
December −9.89** −11.60**
  (4.70) (5.56)
Constant 56.59*** 55.12***
  (7.62) (7.45)
Observations 108 108
Mean of dependent variable 22.79 22.79
Wald Chi-Squared 2734.85 3740.52
  1. *Significant at 10%; **significant at 5%; ***significant at 1%. Coefficient standard errors are noted in parentheses.
  2. Regressions use an autoregressive-moving-average model with 2 lags and robust standard errors. The variables are identified as in Table 3. The month variables represent a dummy variable for each month. The base (omitted) variable is January.