Mobile Electronic LQAS to Monitor Polio Immunization

An Essential Tool for Improving Performance in Polio Endemic Countries

LOT QUALITY ASSURANCE SAMPLING TO MONITOR SUPPLEMENTAL

IMMUNIZATION ACTIVITY QUALITY

Benefits of LQAS

Identifying areas of weak coverage quality

Differentiating areas of varying coverage

Allowing for trend analysis

Tailored LQAS for Nigeria: - clustering - multiple classification thresholds

Expanded to 7 other countries

LQAS AND IM COMPARISONS

In Nigeria, IM only captures 5.3% of the LQAS variance

If IM reports coverage >90%, a 48% chance

LQAS will report a covered fraction

<80%

In Pakistan, IM only captures 12% of the LQAS variance

If IM reports coverage >95%, a 29% chance

LQAS will report a covered fraction

<90%

INTRODUCTION OF MOBILE PHONES

FOR DATA COLLECTION

Results observed: - data transmission took place in real-time - no data were lost, the error rate was <1% - transmission cost negligible compared to

the gains in timeliness - data export from server to local

computer was immediate

Data collected on the mobile phones uploaded, exported, and ready for analysis within 2 days, whereas the paper forms require 4–5 days for processing.

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