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Table 1 Regression modeled estimates of trends in malaria cases at all sentinel sites

From: A description of malaria sentinel surveillance: a case study in Oromia Regional State, Ethiopia

Model

N (facility-month observations)

Coefficient

Incidence rate ratio

Standard error

p-value

All cases linear trend

1528

Year (Linear trend)

0.85

.006

<0.001

All cases year factor

1528

Year 2010

Ref

-

-

Year 2011

1.04

.014

0.010

Year 2012

.71

.011

<0.001

Year 2013

.78

.028

<0.001

P. falciparum cases linear trend

1528

Year

.87

.009

<0.001

P. falciparum cases year factor

1528

Year 2010

Ref

-

-

Year 2011

1.19

.024

<0.001

Year 2012

.74

.017

<0.001

Year 2013

.99

.065

0.860

P. vivax cases linear trend

1528

Year (Linear trend)

.80

.008

<0.001

P. vivax cases year factor

1528

Year 2010

Ref

-

-

Year 2011

.85

.017

<0.001

Year 2012

.65

.014

<0.001

  

Year 2013

.46

.023

<0.001

  1. All regression models include month of the year as a factor variable, and random intercepts at both the primary health care unit level and the health facility level.