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CXRAYDMO
Month date of last chest xray

Codes and Frequencies



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

00NIUX
01JanuaryX
02FebruaryX
03MarchX
04AprilX
05MayX
06JuneX
07JulyX
08AugustX
09SeptemberX
10OctoberX
11NovemberX
12DecemberX
97Unknown-refused·
98Unknown-not ascertainedX
99Unknown-don't know·