. 2016 Jun 9;4:e2095. doi: 10.7717/peerj.2095

Table 2. Oral health characteristics of AxSpA patients and healthy controls.

Variable (number unless otherwise stated)	AxSpA patients (n = 22)	Healthy controls (n = 17)	p-value
Mean decayed missing or filled teeth	13.1 (7.6)	9.9 (7.6)	0.210
Number of individuals with ≥4 sites with PPD ≥ 4 mm (%)	11 (64.7)	5 (22.7)	0.008
Mean number of sites with PPD ≥ 4 mm	5.6 (5.1)	5.1 (11.5)	0.146
Mean number of sites with CAL ≥ 4 mm	10.1 (13.4)	12.6 (25.1)	0.318
Mean number of sites with bleeding on probing	36.6 (21.3)	23.6 (17.6)	0.041
Mean plaque index score	1.0 (0.4)	0.6 (0.4)	0.006
Number meeting CDC severe periodontitis definition (%)	1 (0.1)	2 (0.1)	0.709

Notes.

Brackets contain standard deviations unless otherwise indicated.