highly significantp < 0.01
WHO grade was highly significant in most of the subtests (p < 0.01 in 8/15 subtests and p < 0.05 in 3/15 subtests).
WHO grade was highly significant in most of the subtests (p < 0.01 in 8/15 subtests and p < 0.05 in 3/15 subtests).