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Table 1 Definitions of terms for type of TB, Patient category, and Treatment outcome as per NLCP a guidelines adopted from the WHO [13]

From: Treatment outcomes of childhood tuberculosis in Addis Ababa: a five-year retrospective analysis

Category Definition
Type of TB  
Childhood TB A person aged 0 – 14 years old who was diagnosed with TB and treated for TB disease
Smear-positive pulmonary tuberculosis (SPPTB) Patient with at least two sputum specimens with sputum positive for acid-fast bacilli (AFB) by microscopy, or a patient with only one sputum specimen with smear positive for AFB by microscopy and chest radiographic abnormalities consistent with active pulmonary TB.
Smear-negative pulmonary tuberculosis (SNPTB) Patient with symptoms suggestive of TB with at least two sputum specimens which were negative for AFB by microscopy, and with chest radiographic abnormalities consistent with active PTB (including interstitial or miliary abnormal images), or a patient with two sets of at least two sputum specimens taken at least two weeks apart, and which were negative for AFB by microscopy, and radiographic abnormalities consistent with pulmonary TB and lack of clinical response to one week of broad spectrum antibiotic therapy.
Extra-pulmonary tuberculosis (EPTB) TB of organs other than the lungs, such as lymph nodes, abdomen, genitourinary tract, skin, joints, bones, meninges, etc.
Patient category:  
New case Patient who has never had treatment for TB before or has been on anti-TB treatment for less than four weeks.
Relapse Patient who has been declared cure or treatment completed of any form of TB in the past but who reports back to the health service and is found to be acid fast bacilli smear positive or culture positive.
Treatment failure Patient who, while on treatment remained smear- positive or become again smear-positive at the end of the five month or later after commencing treatment.
Transfer in Patient who started treatment in one health facility and transferred to the hospital to continue treatment and follow up.
Retreatment case Patient who has been treated in the past and include: failure, returned after default, relapse cases, and others, i.e. patients who were previously treated for TB and declared cured before becoming once again a definite case of pulmonary TB.
Treatment outcome  
Cured Finished treatment with negative bacteriology result at the end of treatment
Completed treatment Finished treatment, but without bacteriology result at the end of treatment
Failure Remaining smear positive at five months despite correct intake of medication
Default to treatment Patients who interrupted their treatment for two consecutive months or more after registration
Died Patients who died from TB during the course of treatment
Transferred out Patients whose treatment results are unknown due to transfer to another health facility
Loss to follow up Patient who did not start treatment or whose treatment was interrupted for two consecutive months or more
Successfully treated A patient who completed treatment and cured
Unsatisfactory treatment outcome Patient who died from TB during the course of treatment, interrupted treatment for two consecutive months or more after registration, patient remaining smear positive at five months despite correct intake of medication and patient whose treatment results are unknown due to transfer to another health facility
Unknown No treatment details available (e.g., lost patient notes)
  1. aNTLCP = National TB and Leprosy control programme