Table 3.

Corneal Nerve Evaluations

Parameter	DR Group	Control Group	P a
n	48	22	—
NFD (n/frame), median (range)	3.00 (1.75–4.25)	5.50 (4.00–7.67)	<0.001
NFL (µm), median (range)	1216.85 (450.97–2037.84)	2971.53 (1882.64–3928.15)	<0.001
NBD (n/frame), median (range)	1.50 (0.25–4.50)	8.67 (3.67–12.33)	<0.001
DC density (cells/frame), median (range)	4.00 (0.25–12.50)	2.00 (0.00–6.33)	0.001

^a P values were derived from the Mann–Whitney U test.