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Table 2 Patient and radiographic characteristics in relationship to clubbing as defined by the phalangeal depth ratio in patients with smear positive pulmonary tuberculosis

From: Digital clubbing in tuberculosis – relationship to HIV infection, extent of disease and hypoalbuminemia

Characteristic "Gold standard" measurement p-Value Odds Ratio (95% Confidence limits)
  Clubbing (n = 60) No Clubbing (n = 140)   
Hypoalbuminemia (n = 48) 19 29 0.097 1.8 (0.9 – 3.7)
HIV Seropositive (n = 163) 50 113 0.662 1.2 (0.5 – 2.9)
Karnofsky score ≥ 70% (n = 108) 23 85 0.003 0.40 (0.2 – 0.8)
Karnofsky score less than 70% (n = 92) 37 55 0.003 2.5 (1.3 – 4.9)
Prior TB treatment history (n = 24) 12 12 0.023 2.7 (1.0 – 6.9)
Extent of disease on Chest Radiograph     
Minimal Disease (n = 36) 10 26 0.747 0.9 (0.4 – 2.1)
Moderate Disease (n = 98) 28 70 0.666 0.9 (0.5 – 1.7)
Advanced Disease (n = 65) 21 44 0.621 1.2 (0.6 – 2.3)
Bilateral Lung disease (n = 164) 52 112 0.261 1.6 (0.7 – 4.2)
Cavitary Disease (n = 85) 27 58 0.640 1.2 (0.6 – 2.2)