Table 1a.

Demographic and clinical characteristics of participant population (continuous variables).

Age (years)	17.3 (1.0), 15-19
Mean PD (mm)	0.59 (0.17), 0-1.80
PD ≥4 mm (%)	1.85, 0-66.7
Mean CAL (mm)	0.1 (0.2), 0-2.2
CAL ≥1 mm (%)	2.54, 0-100
Plaque index	1.3 (0.8), 0-3
Gingival index	1.0 (0.8), 0-3

Data are mean (SD) and/or range. PD: probing depth, CAL: clinical attachment loss.