sample_id	group	value	category
A01	A	10	used
A02	A	20	used
A03	A	NA	missing
A04	A	0	used
A05	A	100	rejected
B01	B	5	used
B02	B	15	used
B03	B	25	used
B04	B	NA	missing
B05	B	40	rejected