The Possible Role of Neutrophils in the Induction of Osteoclastogenesis

Table 1

Characteristics of the study population for part A of this study.

	Controls ()	Periodontitis ()	value
Age (years)	45 (26-66)	49 (29-63)	0.5011
Sex (male/female)	6/7	5/4	0.665
Ethnicity (European/non-European)	9/4	6/3	1.000
Smoking (10+ per month/10- per month/not last year)	1/2/10	6/0/3	0.079
Medication (currently using/not currently using)	10/3	2/7	0.027
Body mass index (kg/m^2)			0.008
Number of teeth			0.0405
#teeth with >50% bone loss	N/A		N/A
Sites with plaque (%)	−^a		N/A
Sites with bleeding on probing (%)	−^a		N/A
Probing pocket depth (mm)	−^a		N/A
(%)	−^a		N/A

Age is presented as medians (range: min–max). Other data are presented as or as absolute numbers of subjects. values were calculated with the Mann-Whitney tests (for age), unpaired -tests (for BMI and number of teeth), or chi-square test (Fisher exact tests where appropriate) for categorical data. Statistically significant different (). ^aData were not available for controls since no full mouth periodontal chart has been made. For periodontitis patients, a full mouth periodontal chart was available in the dental records. Abbreviation: N/A = not applicable.