. 2019 Oct 25;34(6):1100–1107. doi: 10.1038/s41433-019-0646-1

Table 3.

Correlations among age, DM duration, HbA1c level and macular optical coherence tomography (SD-OCT) parameters in the DM group

		Age	DM duration	HbA1c	Macular SD-OCT parameters
					MV	CT	CV	NT (3 mm)	IT (3 mm)	TT (3 mm)	ST (3 mm)
Age	r	1	0.365^*	0.155	−0.284^*	−0.086	−0.089	−0.191	−0.302^*	−0.246^*	−0.322^*
Age	p	1	0.001	0.171	0.005	0.408	0.394	0.063	0.003	0.016	0.001
DM duration	r	0.365^**	1	0.382^**	−0.325^*	−0.315^*	−0.321*	−0.420^*	−0.315^*	−0.375^*	−0.441^*
DM duration	p	0.001		0.001	0.004	0.006	0.005	0.000	0.006	0.001	<0.0001
HbA1c	r	0.155	0.382^*	1	−0.054	−0.019	−0.030	−0.023	−0.015	−0.122	−0.052
HbA1c	p	0.171	0.001		0.635	0.866	0.789	0.837	0.897	0.282	0.647

DM diabetes mellitus, HbA1c glycosylated haemoglobin (%), 3 mm 3 mm ETDRS circle, CT centre thickness (microns), CV centre volume (mm³), IT inferior perifoveal thickness (microns), MV macular volume (mm³), NT nasal perifoveal thickness (microns), ST superior perifoveal thickness (microns), TT temporal perifoveal thickness (microns)

*p < 0.05 and bold values indicate statistically significant difference (r = Pearson correlation coefficient, age = years, DM duration = years)