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Table 2 Summary of participant retinal microvascular parameters

From: Retinal microvascular parameters are not significantly associated with mild cognitive impairment in the Northern Ireland Cohort for the Longitudinal Study of Ageing

Retinal microvascular parameters All (n = 1431) No MCI (n = 1275) MCI (n = 156) P-Value
Mean CRAE (PX, SD) 29.643 ± 2.221 29.632 ± 2.213 29.731 ± 2.294 0.60
Mean CRVE (PX, SD) 40.844 ± 3.268 40.858 ± 3.293 40.723 ± 3.059 0.62
Mean AVR (SD) 0.729 ± 0.061 0.728 ± 0.061 0.733 ± 0.064 0.38
Mean fractal dimension arteriolar (SD) 1.557 ± 0.053 1.557 ± 0.053 1.555 ± 0.053 0.60
Mean fractal dimension venular (SD) 1.540 ± 0.051 1.540 ± 0.050 1.539 ± 0.052 0.78
aMean tortuosity arteriolar (SD) 0.114 ± 0.157 0.112 ± 0.157 0.128 ± 0.162 0.24
aMean tortuosity venular (SD) 0.067 ± 0.106 0.068 ± 0.111 0.063 ± 0.056 0.61
  1. Values are n (%) for categorical variables and mean ± SD for continuous variables. P values were calculated by independent samples t tests. Abbreviations: MCI mild cognitive impairment, CRAE central retinal arteriolar equivalent, CRVE central retinal venular equivalent, AVR retinal arteriole/venular ratio, SD standard deviation, PX Pixels. aTortuosity values were multiplied by 1000 in order to be shown in Table. P < 0.05 was considered statistically significant