Table 4.

Tests for univariate normality.

Variables	Pooled Sample (n = 58)				Dental Patients (n = 34)				Mental Health Patients (n = 24)
	D	p	K 2	p	W	p	K 2	p	W	p	K 2	p
OHHS	0.11	0.089	25.36	<0.001	0.96	0.238	0.67	0.715	0.90	0.021	17.48	<0.001
BDI-II	0.14	0.006	11.36	0.003	0.92	0.013	2.84	0.241	0.92	0.045	4.29	0.117
OHIP	0.11	0.088	3.44	0.179	0.95	0.101	11.97	0.003	0.94	0.168	1.85	0.397
CAL	0.07	0.200	25.36	<0.001	0.96	0.170	0.67	0.715	0.97	0.573	17.48	<0.001
IL-1β	0.26	<0.001	345.34	<0.001	0.72	<0.001	345.34	<0.001	0.54	<0.001	345.34	<0.001
IL-6	0.19	<0.001	170.87	<0.001	0.78	<0.001	170.87	<0.001	0.68	<0.001	170.87	<0.001
MMP-8	0.16	0.001	27.30	<0.001	0.81	<0.001	27.30	<0.001	0.79	<0.001	27.30	<0.001
ln(IL-1β)	0.11	0.082	1.06	0.590	0.95	0.165	4.85	0.088	0.89	0.012	8.32	0.016
ln(IL-6)	0.09	0.200	0.63	0.730	0.98	0.637	0.02	0.990	0.96	0.393	3.57	0.168
ln(MMP)	0.15	0.002	3.31	0.191	0.95	0.085	1.60	0.449	0.96	0.378	2.76	0.252

Note. Variables: BDI-II = total score in the Beck Depression Inventory-II, OHHS = total score in the Oral Hygiene Habits Scale, OHIP-14-PD = total score in the Oral Health Impact Profile applied to Periodontal Disease, IL-1β = salivary interleukin 1 beta concentration, CAL = clinical attachment loss = mean of sites with insertion loss (≥1 mm) in each participant, IL-6 = salivary interleukin 6 concentration, MMP-8 = salivary matrix metalloproteinase-8 concentration, ln(IL-1β) = Napierian logarithm of IL-1β, ln(IL-6) = Napierian logarithm of IL-6, and ln(MMP) = Napierian logarithm of MMP-8. Statistics: D = Kolmogorov–Smirnov test statistic with the Lilliefors correction when calculating the probability under null hypothesis of normal distribution, W = Shapiro–Wilk test statistic, K² = D’Agostino–Pearson test statistic, and p = probability value under null hypothesis that scores follow a normal distribution.