Table 1 Patient demographics and abnormality distribution of three hospitals.

From: Using AI system to detect active tuberculosis in a high-prevalence setting on CT scans: a multi-center study

Demographics

Hospital A (n = 618)

Hospital B (n = 568)

Hospital C (n = 555)

F/χ2

P value

Age (yr, mean ± sd.)

57.93 ± 18.03

50.61 ± 19.59

47.83 ± 20.96

42.466

 < 0.001

Sex (n male (%))

407 (65.8)

352 (62.0)

349 (62.9)

2.134

0.344

Abnormal cases

493 (79.8)

448 (78.9)

444 (80.0)

0.248

0.883a

 ATB (n (%))

216 (35.0)

220 (38.7)

201 (36.2)

3.503

0.744b

 Pneumonia (n (%))

139 (22.5)

119 (21.0)

119 (21.5)

–

–

 Pulmonary nodules (n (%))

138 (22.3)

109 (19.2)

124 (22.3)

–

–

Normal cases (n (%))

125 (20.2)

120 (21.1)

111 (20.0)

–

–

  1. aComparison of abnormal and normal cases among settings.
  2. bComparison of ATB, pneumonia, pulmonary nodules and normal cases.
  3. ATB, active tuberculosis.
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