Table 3:

Statistical comparison of vitreous levels by diabetic status, gender and age

LH: Group 1 Units: pg/mg total protein	LH: Group 2 Units: pg/mg total protein	Mann-Whitney U (N1,N2)*	Significance p<0.05
Proliferative diabetic retinopathy (PDR) 25th percentile: 41.6 LH Median: 167.8 75th percentile: 235.4	Non-diabetics 25th percentile: 30.2 LH Median: 40.7 75th percentile: 94.5	U (12,17) = 56	YES
Diabetics without PDR** 25th percentile: 28.6 LH Median: 41.9 75th percentile: 60.81	Non-diabetics 25th percentile: 30.2 LH Median: 40.7 75th percentile: 94.5	U (11, 17) = 93	NO
Males with PDR 25th percentile: 25.2 LH Median: 51.8 75th percentile: 163.4	Females with PDR 25th percentile: 185.5 LH Median: 238.4 75th percentile: 394.5	U (7, 5) = 2	YES
Males without diabetes 25th percentile: 29.7 LH Median: 36.5 75th percentile: 52.79	Females without diabetes 25th percentile: 30.8 LH Median: 70.4 75th percentile: 127.4	U (10, 7) = 24	NO
All females below mean female age (<67.8 years) 25th percentile: 59.7 LH Median: 118.7 75th percentile: 278.4	All females above mean female age (>67.8 yrs) 25th percentile: 70.4 LH Median: 185.5 75th percentile: 238.4	U (8,6)=22	NO
All males below mean male age (<61.4 yrs) 25th percentile: 28.6 LH Median: 38.3 75th percentile: 58.6	All males above mean male age (>61.4 yrs) 25th percentile: 27.0 LH Median: 39.9 75th percentile: 53.3	U (10,16) = 65	NO

^*N1= # samples in Group 1; N2= # samples in Group 2

^**Diabetics without PDR ranged from no retinopathy to non-proliferative retinopathy