showed a trendp = 0.2
Interestingly, unvaccinated recovered COVID-19 HCWs showed a trend to an increase in LF/HF (Mann–Whitney U-test, z = −1.26, p = 0.2) and a decrease in mean SDNN (Mann–Whitney U-test, z = −1.22, p = 0.22) and mean RMSSD (Mann–Whitney U-test, z = −1.89, p = 0.06) when compared to vaccinated recovered COVID-19 HCWs, although these differences were not statistically significant ( Supplementary Material, Table S6 ).