#####################################
#                                   #
# Note:  Missing value codes have   #
#        been changed to -9 instead #
#        of "."                     #
#                                   #
#####################################


			DOCUMENTATION FOR MAYO.DAT

				(FREE FORMAT)

===============================================================================
	      VARIABLE				CODES
===============================================================================
	 1. age					in years

	 2. albumin				gm/dl

	 3. alkaline phosphatase		U/liter
					        . = missing

	 4. ascites				0 = no
						1 = yes
					        . = missing

	 5. serum bilirubin			mg/dl

	 6. serum cholesterol			mg/dl
					         . = missing

	 7. edema				0 = no
						1 = yes

	 8. edema treatment			0 = none and no treatment
					       .5 = edema but no treatment,
						    or edema resolved
						    by treatment
						1 = edema despite treatment

	 9. hepatomegaly			0 = no
						1 = yes
					        . = missing

	10. time				days between
						registration and earlest of
						death, liver transplantation
						and July 1986

	11. platelets				count per mm^3 blood/1000
	

	12. prothrombin time			seconds

	13. sex					0 = male
						1 = female
					        . = missing
	
	14. SGOT				U/ml
					        . = missing

	15. spiders				0 = no
						1 = yes
					        . = missing

	16. stage				1,2,3,4
					        . = missing

	17. censoring				1 = death
						0 = other

	18. treatment				1 = D-penecillamine
						2 = placebo
					        . = not randomized

	19. trigycerides			mg/dl
					        . = missing

	20. urine copper			micrograms/day
					        . = missing
===============================================================================
312 records on the 312 randomized patients