Table 1

Ocular findings in control subjects and in subjects with diabetes according to the presence (PN+) or absence (PN−) of diabetic PN

Control subjects (n = 38)PN− (n = 27)PN+ (n = 34)P
Ocular surface dryness (DEWS criteria)11 (28.9)12 (44.4)26 (76.5)<0.001
Schirmer I test, mm
 Right eyes15.10 ± 6.7812.15 ± 4.9310.05 ± 6.750.004
 Left eyes15.73 ± 7.6813.61 ± 6.3110.48 ± 7.070.01
TBUT, s
 Right eyes11.36 ± 2.929.69 ± 3.687.08 ± 2.56<0.001
 Left eyes12.02 ± 3.2010.09 ± 3.297.51 ± 2.76<0.001
Cochet-Bonnet score, cm
 Right eyes4.71 ± 0.344.46 ± 0.423.50 ± 0.81<0.001
 Left eyes4.69 ± 0.354.48 ± 0.453.51 ± 0.84<0.001
Cochet-Bonnet score
 ≥4.5 (normal)20 (52.6)8 (29.6)3 (8.8)
 4–4.49 (borderline)18 (47.4)18 (66.7)10 (29.4)
 <4.0 (abnormal)0 (0)1 (3.7)21 (61.8)<0.001
  • Data are mean ± SD or n (%). PN−, absence of diabetic PN; PN+, presence of diabetic PN.