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Table 3 Main characteristic of the eligible studies for the periodontitis treatment and dyslipidemia

From: Exploring the bi-directional relationship between periodontitis and dyslipidemia: a comprehensive systematic review and meta-analysis

Author, year

Country

Study design

Sample size (treat / control)

Diagnosis criteria for periodontitis

Mean age (year)

Age ratio (treat: control)

% Males

Male ratio (treat: control)

Therapeutic Schedule

Dyslipidemia diagnosis (any of the following indicators, mg/dl)

Lipids index

Effect index

Matching or correction factor

Quality

Duan JY, 2009 [67]

China

Cohort (prospective)

20

Secure

55.60

NI

55

NI

Initial therapy

TC > 220; TG > 150; HDL < 35; LDL > 140

TC, TG, LDL, HDL

Mean (SD)

–

High

Fentoglu O, 2010 [68]

Turkey

Cohort (prospective)

20

Insecure

51.85

NI

40

NI

Initial therapy

TG > 200; TC > 200; LDL > 130; HDL < 35; VLDL > 40

TG, TC, LDL, HDL

Mean (SD)

–

High

Fu YW, 2016 [69]

Chnia

RCT

54/55

Secure

46.93

0.99

  

Treat group: Initial therapy; Control group: supragingival scaling

TG > 20; HDL < 40; LDL > 160

TC, TG, LDL, HDL

Mean (SD)

–

High risk of bias

Losche W, 2005 [70]

Germany

Cohort (prospective)

32

NI

42.80

NI

53.13

NI

Initial therapy

NI

TC, TG, LDL, HDL

Mean (SD)

–

Moderate

Macovei-Surdu A, 2013 [71]

Romania

Cohort (prospective)

30/30

Insecure

39.53

0.96

60

1.36

Treat group: Initial therapy: Control group: oral hygiene maintenance measures

NI

TC, TG, LDL, HDL

Mean

–

Moderate

Nassar PO, 2012 [72]

Brazil

RCT

10/10

Secure

NI

NI

NI

NI

Treat group: Initial therapy, Maintenance therapy: Control group: Initial therapy

NI

TC, TG

Mean (SD)

–

Unclear risk of bias

Nibali L, 2015 [101]

United Kingdom

Cohort (prospective)

12

Secure

NI

NI

NI

NI

Initial therapy, open flap debridement

 

LDL, HDL, IDL, VLDL

Mean (SD)

Age, gender and number of teeth

High

Nicolaiciuc O, 2016 [74]

Romania

Cohort (prospective)

20

Insecure

49.55

NI

40

NI

Initial therapy

TG > 200; TC > 200; LDL > 130; HDL < 35; VLDL > 40

TG, TC, LDL, HDL, VLDL

Mean (SD)

–

Moderate

Oz SG, 2007 [75]

Turkey

RCT

25/25

Insecure

50.34

0.95

38

1.11

Treat group: Initial therapy: Control group: without applying periodontal treatment

TC>200; LDL>130; HDL<35; VLDL> 40; TG>200

TG, TC, LDL, HDL, VLDL

Mean (SD)

–

Unclear risk of bias

Tawfig A, 2015 [76]

Saudi Arabia

RCT

15/15

Insecure

NI

NI

63.33

1.38

Treat group: Initial therapy, oral hygiene instructions, Control group: oral hygiene instructions

TC ≥200; LDL ≥130; HDL ≤35; TG ≥150

TC, TG, LDL, HDL

Mean (SD)

–

Unclear risk of bias

Zuza EP, 2016 [77]

Brazil

Cohort (prospective)

54

Secure

44.26

NI

25.93

NI

Initial therapy

NI

TC, TG, LDL, HDL

Mean (SD)

–

High

Abhay Pandurang Kolte, 2022 [78]

India

Intervention trial

60

Secure

NI

NI

36.67

NI

Non-surgical periodontal treatment

NI

TC, TG, LDL, HDL

Mean (SD)

–

–

  1. Initial therapy: supragingival scaling, subgingival scaling and root planning
  2. Abbreviation: RCT randomised clinical trial, TC total cholesterol, TG triglyceride, LDL low density lipoprotein cholesterol, HDL high density lipoprotein cholesterol, VLDL very low density lipoprotein cholesterol, NI not informed, SD standard error