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. Author manuscript; available in PMC: 2013 Sep 27.
Published in final edited form as: Int J Tuberc Lung Dis. 2008 Sep;12(9):1059–1064.

Table 3.

Predictors of relapse when culture data are not available

Variable Univariate HR (95%CI) Multivariable HR (95%CI)
Treatment arm 1.86 (1.09–3.16) NA
Initial sputum smear
    Negative or <2+ AFB 1.0 (referent) 1.0 (referent)
    High bacillary load (≥3+ AFB) 2.74 (1.61–4.66) 1.95 (1.14–3.34)
Cavity on CXR
    None 1.0 (referent) 1.0 (referent)
    Cavity on early CXR, resolved 3.01 (1.42–6.40) 2.23 (1.04–4.79)
    Persistent cavity on EOT CXR 7.23 (3.52–14.85) 4.81 (2.31–10.03)
White race 2.53 (1.49–4.31) 2.24 (1.31–3.81)
Underweight 4.13 (2.44–6.98) 3.19 (1.88–5.42)

HR = hazard ratio; CI = confidence interval; NA = not available; AFB = acid-fast bacilli; CXR = chest radiograph; EOT = end of treatment.