PMID- 10736582
OWN - NLM
STAT- MEDLINE
DCOM- 20000801
LR  - 20060523
IS  - 0019-6061 (Print)
IS  - 0019-6061 (Linking)
VI  - 36
IP  - 6
DP  - 1999 Jun
TI  - Lot quality assurance sampling for monitoring immunization coverage in Madras 
      City.
PG  - 555-9
AB  - OBJECTIVE: To explore the usefulness of Lot Quality Assurance Sampling (LQAS) to 
      identify divisions in a city that had immunization coverage levels of 80% for any 
      of the four EPI vaccines. METHODS: Only 43 divisions were considered for the 
      study, the stratification factor being the death rate. The hypothesis that 80% 
      coverage is 'unacceptable' was stipulated. Critical value (the number of 
      unimmunized children) was chosen as 3. A simple random sample of 36 children in 
      the age-group 12-23 months was taken from each selected division. Since sampling 
      frames of children were not available, a simple random sample of 36 households 
      was selected. Immunization status of each child was assessed by interviewing the 
      child's mother/guardian. If the number of unimmunized children exceeded 3, then 
      the division was regarded having coverage level 80% and rejected. RESULTS: The 
      coverage was classified as unacceptable(i. e., below 80%) in 19 divisions for 
      Polio and DPT vaccines, in 26 divisions for Measles vaccine and in 4 divisions 
      for BCG vaccine. The average time spent for undertaking the LQAS survey was 6 
      man-days per division. CONCLUSION: This study demonstrated the utility of the 
      LQAS technique in identifying 'unsatisfactory' pockets in Madras City, when the 
      overall coverage was satisfactory. The technique will have greater application 
      with an increase in the number of large units (cities/districts) having an 
      overall coverage of 90% or more.
FAU - Murthy, B N
AU  - Murthy BN
AD  - Institute for Research in Medical Statistics, Spur Tank Road, Chetput, Chennai 
      600 031, India.
FAU - Radhakrishna, S
AU  - Radhakrishna S
FAU - Venkatasubramanian, S
AU  - Venkatasubramanian S
FAU - Periannan, V
AU  - Periannan V
FAU - Lakshmi, A
AU  - Lakshmi A
FAU - Joshua, V
AU  - Joshua V
FAU - Sudha, R
AU  - Sudha R
LA  - eng
PT  - Journal Article
PL  - India
TA  - Indian Pediatr
JT  - Indian pediatrics
JID - 2985062R
SB  - IM
MH  - Health Care Surveys
MH  - Health Services Accessibility/statistics & numerical data
MH  - Humans
MH  - Immunization Programs/*standards
MH  - India
MH  - Infant
MH  - Quality Assurance, Health Care/*methods
MH  - Quality Control
MH  - Sampling Studies
EDAT- 2000/03/29 09:00
MHDA- 2000/08/06 11:00
CRDT- 2000/03/29 09:00
PHST- 2000/03/29 09:00 [pubmed]
PHST- 2000/08/06 11:00 [medline]
PHST- 2000/03/29 09:00 [entrez]
PST - ppublish
SO  - Indian Pediatr. 1999 Jun;36(6):555-9.