This data set contains records of 720 younger onset diabetic persons. Cases with any missing value in the outcome data or covariates have been deleted from the original data set. Below are descriptions for the columns in the data file. The format is as follows: VARIABLE DESCRIPTION ======== ================================================================== 1 RIGHT EYE RETINOPATHY LEVEL THE LEVELS ARE 1,1.5,2,3,4,5,6,7,8 GOING FROM NONE TO WORST. 2 LEFT EYE RETINOPATHY LEVEL - SAME AS THE RIGHT EYE 3 THIS IS A RETINOPATHY LEVEL COMBINING BOTH EYES. IT HAS VALUES FROM 1 (THE WORST RETINOPATHY IN BOTH EYES) TO 40 (NO RETINOPATHY IN BOTH EYES). THUS, THE SCALE IS THE REVERSE OF THE ABOVE IN THAT SMALLER NUMBERS ARE WORSE THAN LARGER NUMBERS. ------- ------------------------------------------------------------------ 4 RIGHT EYE MACULAR EDEMA (ABSENT=0 OR PRESENT=1) 5 LEFT EYE MACULAR EDEMA - SAME AS THE RIGHT EYE 6 RIGHT EYE REFRACTIVE ERROR (SPHERICAL EQUIVALENT) - THIS MAY BE A POSITIVE OR NEGATIVE NUMBER. 7 LEFT EYE REFRACTIVE ERROR - SAME AS THE RIGHT EYE 8 RIGHT EYE INTRA-OCULAR PRESSURE (IOP) 9 LEFT EYE INTRA-OCULAR PRESSURE - SAME AS THE RIGHT EYE -------- ------------------------------------------------------------------ 10 AGE AT DIAGNOSIS OF DIABETES (YEARS) 11 DURATION OF DIABETES (YEARS) 12 GLYCOSYLATED HEMOGLOBIN 13 SYSTOLIC BLOOD PRESSURE 14 DIASTOLIC BLOOD PRESSURE 15 BODY MASS INDEX 16 PULSE RATE (BEATS/30 SECONDS) 17 SEX (MALE=1, FEMALE=2) 18 PROTEINURIA (ABSENT=0, PRESENT=1) 19 DOSES OF INSULIN PER DAY TAKEN BY THE PATIENT - VALUES ARE 0,1,2 20 TYPE OF COUNTY OF RESIDENCE (URBAN=1, RURAL=2) -------- ------------------------------------------------------------------ 21 RIGHT EYE RETINOPATHY LEVEL - coarse classification 22 LEFT EYE RETINOPATHY LEVEL - SAME AS THE RIGHT EYE The levels are combined to 1 (none), 2 (mild), 3 (moderate), and 4 (proliferative); none = 1 mild = 1.5, 2, 3 moderate = 4, 5 proliferative = 6, 7, 8 23 COARSE RETINOPATHY LEVEL COMBINING BOTH EYES. IT HAS VALUES FROM 1 (NO RETINOPATHY IN BOTH EYES) TO 10 (THE WORST RETINOPATHY IN BOTH EYES) -------- ------------------------------------------------------------------