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Free Content Quality control of sputum smear examination in Cebu Province

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SETTING: Rural Health Units (RHUs) in Cebu Province, Philippines.

OBJECTIVE: To assess and improve the on-going quality control of tuberculosis activities in Cebu Province.

METHODS: During the period of the study, from January 1996 to December 1997, positive slides (100% in 1996 and 20% or 100% in 1997) and 20% of negative slides selected from all of the slides examined at the RHUs were assessed on the quality of smear preparation. The readings were blindly cross-checked by the provincial assessors.

RESULTS: In 1997, 1) 90% of RHUs participated in the quality control activity; 2) the proportion of good quality smears increased markedly; and 3) the false positive and false negative rates did not change during the period, but most of the false positives were observed among the scanty positives of the field reading, and no false negatives were noted among the heavily positive slides.

CONCLUSION: Although the false positive and negative rates did not decrease during the period, the quality control procedure resulted in marked improvements in smear preparation, a high participation of RHUs in the quality control programme and the elimination of large discrepancies between readers on positive slides in 1997. It is considered to have significantly improved the NTP's smear microscopy service in Cebu Province.
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Keywords: TB microscopy; The Philippines; quality assurance; quality control; sputum smear examination

Document Type: Regular Paper

Affiliations: 1: Department of International Cooperation, The Research Institute of Tuberculosis, Tokyo, Japan 2: Cebu Provincial Health Office, Cebu, The Philippines

Publication date: 2002-01-01

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  • The International Journal of Tuberculosis and Lung Disease publishes articles on all aspects of lung health, including public health-related issues such as training programmes, cost-benefit analysis, legislation, epidemiology, intervention studies and health systems research. The IJTLD is dedicated to the continuing education of physicians and health personnel and the dissemination of information on tuberculosis and lung health world-wide.

    Certain IJTLD articles are selected for translation into French, Spanish, Chinese or Russian. They are available on the Union website

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