Table 2.

Age, diabetes duration and age at diabetes onset of clinically diagnosed and assumed periodontitis cases in T1DM and T2DM patients

	T1DM with periodontitis	T1DM without periodontitis	T2DM with periodontitis	T2DM without periodontitis
Patients with CPI (n = 461)
Age	49 [41;57]	50 [29;58]	68 [57;76]	67 [57;75]
Diabetes duration	19 [9;28]	25 [17;33]	11 [5;17]	11 [6;17]
Age at diabetes onset	30 [21;42] *	23 [11;35] *	54 [46;64]	54 [45;61]
Patients with AAP risk score (n = 1180)
Age	52 [42;61] ***	40 [26;55] ***	69 [59;77] *	66 [57;75] *
Diabetes duration	18 [11;28]	17 [9;33]	12 [6;17]	11 [5;17]
Age at diabetes onset	30 [23;40] ***	17 [10;32] ***	55 [46;63]	54 [46;61]

AAP risk score by the American Association of Periodontology; CPI Community Parodontal Index; clinically diagnosed periodontitis: CPI > 2; assumed periodontitis: modified AAP risk score > 21 points; median and IQR are given; Mann–Whitney U tests comparing periodontitis vs. non-periodontitis cases; significant differences are indicated by * p < 0.05; ** p < 0.01; *** p < 0.001