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. 2023 Dec 18;11:1300291. doi: 10.3389/fpubh.2023.1300291

Table 4.

Analysis of variance for the model of log VOCs on the fixed effect of activity and the random effects of salon and shift within salon with the Kenward-Roger degrees of freedom method.

SS MS Num df Den df F value p-value
Activity 53.7 10.7 5 1,136 4.052 0.001

These are Type III sums of squares, which is the sum of squares given all other effects in the model. SS, sum of squares; MS, mean squares; Num df, numerator degrees of freedom; Den df, denominator degrees of freedom.