Table 2.
Percent HR reductions following cholinergic neuron photoactivation at each irradiance were analyzed using Bonferroni post hoc comparisons.
| LED source | Irradiance (mW/mm2) | HR reduction relative to pre-photoactivation | HR reduction relative to 0.68 mW/mm2 | HR reduction relative to 1.15 mW/mm2 | HR reduction relative to 1.81 mW/mm2 |
|---|---|---|---|---|---|
| Spotlight | 0.68 | 24%, <0.001 | |||
| Spotlight | 1.15 | 35%, <0.001 | 11%, 0.352 | ||
| Spotlight | 1.81 | 45%, <0.001 | 21%, 0.003 | 11%, 0.422 | |
| Micro LED | 2.4 | 43%, <0.001 | 19%, 0.008 | 8%, 0.873 | -2%, 1.000 |
The third column shows the average percentage that HR was reduced during photoactivation relative to pre-photoactivation. P values for corresponding percent reductions are also shown. Columns 4–6 compare HR reductions during photoactivation at each irradiance. Note the statistically significant difference in reduction for all irradiance levels compared to pre-photoactivation but no statistically significant difference between HR reductions at irradiance levels of 1.15, 1.81, and 2.4 mW/mm2.