Volume 20, Number 3—March 2014
Minimal Diversity of Drug-Resistant Mycobacterium tuberculosis Strains, South Africa1
|Category||Unadjusted hazard ratio||p value||Adjusted hazard ratio||p value|
|Spoligotype (ST) pattern||Ref||Ref||–|
|All other ST types
|DST group: drug-susceptible||Ref||Ref|
|Positive sputum smear||1.32||0.20|
*Ref, referent; KZN, KwaZulu-Natal DST; drug susceptibility testing; MDR, multidrug-resistant, XDR, extensively drug resistant.
†If a patient had differing isolates on the same day, the less resistant of the 2 was used for these analyses. Results did not change when the more resistant isolate was used (data not shown).
1Preliminary results from this study were presented at the American Thoracic Society International Conference, May 15–20, 2009, San Diego, California, USA.