not quite significantp = 0.058
The difference was not quite significant for the continuously varying MHI-5 scores either (p = 0.058 in t-test and p = 0.064 for Kruskal-Wallis test), but the continuous ISI scores at the last follow up were still statistically significantly higher for the early frontline employees than for the non-frontline employees (6.82 vs. 5.51; p = 0.001 in t-test and p = 0.001 in Kruskal-Wallis test).