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Table 2 Study specification: cognitive assessment tool and dementia incidence rate by high/low residual teeth number groups

From: Association between residual teeth number in later life and incidence of dementia: A systematic review and meta-analysis

Study

Publishing year

Cognitive assessment tool

Dementia incidence rate, per 100,000 persons

   

High residual teeth number group

Low residual teeth number group

Takeuchi et al. [22]

2017

DSM-III-Ra

7391 (≥ 20 teeth remaining)

16,939 (≤ 19 teeth remaining)

Komiyama et al. [23]

2016

MMSEb

6417 (≥ 20 teeth remaining)

11,087 (≤ 19 teeth remaining)

Stewart et al. [24]

2015

DSM-III-Ra

18,304 (≥ 21 teeth remaining)

30,522 (≤ 20 teeth remaining)

Luo et al. [25]

2015

DSM-IVc and MCId

2063 (< 16 missing teeth)

9783 (> 16 missing teeth)

Batty et al. [10]

2013

MMSEb

484 (≥ 22 teeth remaining)

1320 (≤ 21 teeth remaining)

Paganini-Hill et al. [26]

2012

MMSEb

21,592 (≥ 16 teeth remaining)

19,271 (≤ 15 teeth remaining)

Yamamoto et al. [27]

2012

A standardized questionnaire developed by the Ministry of Health, Labor, and Welfare in Japan

2848 (≥ 20 teeth remaining)

5854 (≤ 19 teeth remaining)

Arrivé et al. [20]

2011

DSM-III-Ra

31 (< 11 missing teeth)

41 (≥ 11 missing teeth)

Kim et al. [11]

2007

DSM-IVc

5556 (≥24 teeth remaining)

9908 (< 24 teeth remaining)

Stein et al. [21]

2007

MMSEb

36,468 (unknown)

68,421 (unknown)

Shimazaki et al. [28]

2001

Historical diagnosis information from medical records

13,235 (≥ 20 teeth remaining)

32,739 (≤ 19 teeth remaining)

  1. aDSM-III-R = Diagnostic and Statistical Manual of Mental Disorders, Revised, Third Edition
  2. bMMSE = Mini-Mental State Examination
  3. cDSM-IV = Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition
  4. dMCI = Mild Cognitive Impairment