Table 2 Macular perfusion parameters before and after drinking coffee or water
|  |  | Baseline (n = 27) | 0.5 h after drinking (n = 26)# | 2 h after drinking (n = 26)# |
|---|---|---|---|---|
Coffee | Â | Â | Â | Â |
Superficial retinal layer | Vessel diameter index | 19.13 ± 0.26 | 19.11 ± 0.25 | 19.05 ± 0.24‡ |
|  | Vessel area density | 0.47 ± 0.01 | 0.46 ± 0.01 | 0.47 ± 0.02 |
|  | Vessel skeleton density | 0.14 ± 0.00 | 0.14 ± 0.00 | 0.14 ± 0.01 |
|  | Flow impairment regiona | 0.38 ± 0.18 | 0.39 ± 0.15 | 0.45 ± 0.26 |
Deep retinal layer | Vessel diameter index | 18.43 ± 0.19 | 18.37 ± 0.20 | 18.36 ± 0.22 |
|  | Vessel area density | 0.45 ± 0.02 | 0.45 ± 0.02 | 0.45 ± 0.02 |
|  | Vessel skeleton density | 0.14 ± 0.00 | 0.14 ± 0.00 | 0.14 ± 0.01 |
|  | Flow impairment region | 0.33 ± 0.11 | 0.34 ± 0.16 | 0.32 ± 0.12 |
Overall retinal layer | Vessel diameter index | 18.73 ± 0.23 | 18.70 ± 0.24 | 18.66 ± 0.22†|
|  | Vessel area density | 0.48 ± 0.01 | 0.48 ± 0.01 | 0.48 ± 0.02 |
|  | Vessel skeleton density | 0.15 ± 0.00 | 0.15 ± 0.01 | 0.15 ± 0.01 |
|  | Flow impairment region | 0.35 ± 0.13 | 0.36 ± 0.13 | 0.38 ± 0.20 |
Water | Â | Â | Â | Â |
Superficial retinal layer | Vessel diameter index | 19.08 ± 0.29 | 19.10 ± 0.30 | 19.08 ± 0.27 |
|  | Vessel area density | 0.47 ± 0.01 | 0.47 ± 0.01 | 0.47 ± 0.01 |
|  | Vessel skeleton density | 0.14 ± 0.00 | 0.14 ± 0.00 | 0.14 ± 0.00 |
|  | Flow impairment region | 0.35 ± 0.17 | 0.36 ± 0.19 | 0.35 ± 0.17 |
Deep retinal layer | Vessel diameter index | 18.42 ± 0.24 | 18.39 ± 0.24 | 18.41 ± 0.23 |
|  | Vessel area density | 0.46 ± 0.02 | 0.46 ± 0.01 | 0.46 ± 0.02 |
|  | Vessel skeleton density | 0.14 ± 0.00 | 0.14 ± 0.00 | 0.14 ± 0.00 |
|  | Flow impairment region | 0.28 ± 0.12 | 0.27 ± 0.10 | 0.29 ± 0.14 |
Overall retinal layer | Vessel diameter index | 18.68 ± 0.24 | 18.70 ± 0.27 | 18.67 ± 0.24 |
|  | Vessel area density | 0.49 ± 0.01 | 0.48 ± 0.01 | 0.49 ± 0.01 |
|  | Vessel skeleton density | 0.15 ± 0.00 | 0.15 ± 0.00 | 0.15 ± 0.00 |
|  | Flow impairment region | 0.33 ± 0.15 | 0.33 ± 0.11 | 0.33 ± 0.13 |