Table 1 Characteristics of patients at different time points in both groups of non-adherence with SPT (NAG) versus adherence with SPT (AG) in a university setting

N of patients (male/female)

24/37

32/26

Age at T1 (mean (SD) (range) in years

48.2(11.3) (range: 26–72)

55.7(11.6) (range: 27–75)

N of patients with light/ moderate-severe CP

9/52

13/45

N of patients with stage II (grade A/B/C)

9 (2/3/4)

11 (2/6/3)

N of patients with stage III (grade A/B/C)

32 (0/12/20)

35 (0/22/13)

N of patients with stage IV (grade A/B/C)

20 (0/2/18)

12 (0/5/7)

N of patients with localized/generalized periodontal disease

45/16

34/24

Time of SPT (mean (SD) (range) in years

15.8(8.2) (range: 1.5–24.9)

14.9(10.6) (range: 2.3–36.9)

N of teeth at T1 (mean (SD) (range)

25.1(3.9) (range: 15–31)

25.5(3.6) (range: 14–31)

N of teeth/last entry in medical record in SPT (mean (SD) (range)

22(6.4) (range: 2–30)

23.2 ± 5.2 (range: 7–31)

N of teeth at T2 (mean (SD) (range)

21(7.1) (range: 2–34) (self-reported)

22.3(6.3) (range: 8–32)

N of patients with tooth loss 0/1–3/4–6/≥ 7 during observation time

19/ 22/ 13/ 7 (self-reported)

17/ 29/ 5/ 7

N of tooth loss at T2 (mean(SD) (range)

3.1(4.3) (range: 0–24) (calculated according self-reported T2 and data of T1)

2.3(2.9) (range: 0–12) (calculated according documentation in clinical charts)

N of smoker/former smoker/never smoker (T1)

18/18/25

13/21/24

N of smoker/former smoker/never smoker (T2)

18/18/25

12/22/24

N of cigarettes (mean(SD) (range) per day for active smoker at T2

13.4 ± 9.8 (range: 0–40)

12.9 ± 4.5 (range: 4–20)

N of stops smoking (mean(SD) (range) for active smoker at T2

3.3(2.6) (range: 1–10)

2.4(3.4) (range: 1–10)

N of patients with DM at T1 (mean(SD) (range)

2

3

HbA1c (glycated haemoglobin) at T1 (mean(SD) (range)

7.7(1.5) (range: 6.6–8.7)

7.0(1.1) (range: 6.0–8.1)/

N of patients with DM at T2 (mean(SD) (range)

4

4

HbA1c (glycated haemoglobin) at T2 (mean(SD) (range)

6,7(0.4) (range: 6.1–7.1)

6.5(0.5) (range: 6.0–7.1))