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CXRAY135YR
Time since last chest xray: 3, 5, or more years ago

Codes and Frequencies



An 'X' indicates the category is available for that sample

0NIUX
1Within the past yearX
21 to 3 years agoX
3Over 3 years agoX
7Unknown-refused·
8Unknown-not ascertainedX
9Unknown-don't knowX