Table 1. Datasets used for phase I deep convolutional neural network training and validation.

Dataset	Development phase	Total number of radiographs used	Number with suspected TB (%)	Number without suspected TB (%)
NIH CXR	Training/validation	11,000	5,381 (48.9)*	5619 (51.1)*
Montgomery County, USA	Testing	138	58 (42.0)	80 (58.0)
Shenzhen, China	Testing	662	336 (50.8)	326 (49.2)
Johns Hopkins Hospital, Baltimore, MD, USA	Testing	100	35 (35.0)	65 (65.0)

*, ground truth determined by a cardiothoracic radiologist. CXR, chest radiograph; TB, tuberculosis.