Table 3.

Tobit regression analyses of the severity and extent of dental caries parameters in groups stratified by disease status

Variables	CD (n = 265) Median (IQR)	P1	Controls (n = 265) Median (IQR)	P2	UC (n = 124) Median (IQR)	P3
DMFT	5.00 (2.00–7.00)	< 0.001	2.00 (0.00–3.00)	< 0.001	4.00 (2.00–7.00)	0.711
DMFS	7.00 (3.00–16.00)	< 0.001	2.00 (0.00–5.00)	< 0.001	6.00 (2.00–15.00)	0.154
DT	3.00 (1.00–6.00)	< 0.001	0.00 (0.00–1.00)	< 0.001	2.00 (1.00–5.00)	0.330
MT	0.00 (0.00–1.00)	< 0.002	0.00 (0.00–0.00)	< 0.002	0.00 (0.00–1.00)	0.300
FT	0.00 (0.00–2.00)	0.724	0.00 (0.00–1.00)	1.000	0.00 (0.00–1.00)	0.716
DS	5.00 (2.00–9.00)	< 0.001	0.00 (0.00–2.00)	< 0.001	4.00 (1.00–8.00)	0.773
MS	0.00 (0.00–5.00)	< 0.001	0.00 (0.00–0.00)	0.061	0.00 (0.00–5.00)	0.280
FS	0.00 (0.00–3.00)	0.126	0.00 (0.00–2.00)	1.000	0.00 (0.00–2.00)	0.126

After adjusting for age, sex, education level, smoking and the daily frequency of tooth-brushing, P-values were obtained from Tobit regression analyses, while pairwise comparisons were performed using Bonferroni correction.

P1: significance of the differences between patients with CD and controls; P2: significance of the differences between patients with UC and controls; P3: significance of the differences between patients with CD and UC.

Significant results (P < 0.05) are highlighted in bold.

CD, Crohn’s disease; DMFS, decayed, missing and filled surfaces; DMFT, decayed, missing and filled teeth; DS, decayed surfaces; DT, decayed teeth; FS, filled surfaces; FT, filled teeth; IQR, interquartile range; MS, missing surfaces; MT, missing teeth; UC, ulcerative colitis.