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Table 1 Patient characteristics

From: Predictive factors for tooth loss during supportive periodontal therapy in patients with severe periodontitis: a Japanese multicenter study

 

n (%)

Initial examination

Start of SPT

Sex

Male

34 (41.5)

 

Female

48 (58.5)

Age

≤ 34

9 (11.0)

5 (6.1)

35–44

25 (30.5)

20 (24.4)

45–54

27 (32.9)

27 (32.9)

55–64

16 (19.5)

24 (29.3)

≥ 65

5 (6.1)

6 (7.3)

Diabetes status

Non-DM

80 (97.6)

80 (97.6)

DM

2 (2.4)

2 (2.4)

Smoking history

Non-smoker

62 (75.6)

62 (75.6)

Smoker

20 (24.4)

20 (24.4)

Number of sites with PD ≥ 6 mm

< 8

6 (7.3)

80 (97.6)

≥ 8

76 (92.7)

2 (2.4)

BOP

< 25%

13 (15.9)

69 (84.1)

≥ 25%

69 (84.1)

13 (15.9)

Bone loss/age ratio

< 1.0

16 (19.5)

25 (30.5)

≥ 1.0

66 (80.5)

57 (69.5)

Number of teeth lost

< 8

74 (90.2)

66 (80.5)

≥ 8

8 (9.8)

16 (19.5)

MPRA

Low risk

 

27 (32.9)

Moderate risk

34 (41.5)

High risk

21 (25.6)

TRP assessment

Favorable

61 (74.4)

Poor

21 (25.6)

  1. DM diabetes mellitus, PD probing depth, BOP bleeding of probing, MPRA modified periodontal risk assessment, TRP therapy-resistant periodontitis