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Table 2 Description of studies investigating the longitudinal association of DM with AF types

From: Association of diabetes with atrial fibrillation types: a systematic review and meta-analysis

 

First author, year (Reference)

Country

N

Population

Mean age (years)

Females (%)

DM assessment

Adjustment for potential confounders

Outcome (Ref)

Follow-up time

Result

A. Studies providing hazard ratios (Method: Cox regression)

 1

Tsang, 2007

United States

3248

Patients with first episode of paroxysmal AF

71 ± 15

46

DM medical diagnosis or treatment with antidiabetic medications

Age, sex

Permanent AF

(Ref: no AF recurrence, recurrent paroxysmal AF, recurrent persistent AF)

Median (IQR),

5.1 (1.2–9.4) y

aHR (CI), 1.17 (0.94–1.47)

 2

Pappone, 2008

Italy

106

Patients with first episode of paroxysmal AF

57.5

35.8

NR

Age, HF

Permanent AF

(Ref: no AF recurrence, recurrent paroxysmal AF, recurrent persistent AF)

Maximum, 5 y

aHR (CI), 17.37 (3.75–80.43)

 3

Kawara, 2010

Japan

64

Paroxysmal or persistent AF

61 ± 10

29.6

NR

Age, sex, HTN, organic heart disease, HF, severity of symptoms

Permanent AF

(Ref: non-permanent AF)

Median (IQR), 4.9

(2.4–8.9) y

aHR (CI), 3.13 (0.46–21.2)

 4

Thacker, 2013

United States

1385

Patients whose initial AF episode terminated within 6 months

69.2

48.7

DM medical diagnosis, and current use of insulin or oral

hypoglycemic medication

Age, sex

Permanent AF (Ref: non-permanent AF)

Mean (range), 7

(5–8) y

Model 1

aHR (CI), 0.99 (0.72–1.36)

Age, sex, BMI, HTN, SBP, DBP

Model 2

aHR (CI), 0.93 (0.67–1.29)

Age, sex, BMI, HTN, SBP, DBP, CHD, valvular heart disease, HF, stroke

Model 3

aHR (CI), 0.94 (0.67–1.32)

 5

Senoo, 2014

Japan

1176

Paroxysmal AF

61.4 ± 13.1

25.6

NR

-

Recurrent AF (Ref: non-recurrent AF)

Mean (sd), 3.3 ± 2.5 y

uHR (CI), 1.47 (0.89–2.44)

 6*

Sandhu, 2014

United States

1039

Patients who developed AF in a cohort free of AF

58.9

100

NR

Age, aspirin, vitamin E, beta‐carotene, BMI, HTN, cholesterol, alcohol, smoking, exercise

Non-paroxysmal AF

[i.e., persistent or permanent]

(Ref: paroxysmal AF)

Median (IQR), 16.4 (15.6–16.8) y**

Model 1

aHR (CI), 1.04 (0.72 to 1.41)***

Age, MI, stroke, revascularization, HF

Model 2

aHR (CI), 1.06 (0.69–1.5)***

 7

Blum, 2019

Switzerland

2869

Paroxysmal or persistent AF

70 ± 9

32.3

NR

Age, sex

AF Progression [i.e., paroxysmal to persistent or permanent, persistent to permanent]

(Ref: paroxysmal or persistent AF)

Median (IQR), 3 (2–5) y

Model 1

aHR (CI), 1.14 (0.88–1.48)

Age, sex, BMI, heart rate, SBP, coronary artery disease, HTN, stroke/TIA, HF, hyperthyroidism, history of renal failure, physical activity, smoking, history of pulmonary vein isolation, AF‐related symptoms, amiodarone

Model 2

aHR (CI), 0.92 (0.69–1.21)

B. Studies providing odds ratios (Method: Logistic regression)

 8*†

Sakamoto, 1995

Japan

137

Paroxysmal AF

64

24.8

Use of antidiabetic therapy

Chronic AF (Ref: paroxysmal AF)

Mean, 1 y

uOR (CI), 2.52 (1.05–6.05)

 9*†

Kerr, 2005

Canada

757

Paroxysmal AF

64

38.3

NR

Chronic AF

(Ref: paroxysmal AF)

8 (0–11) y

uOR (CI), 1.07 (0.60–1.92)

 10*

Pillarisetti, 2009

United States

437

Paroxysmal AF

67.9 ± 13.4

43

NR

Non-paroxysmal AF

[i.e., persistant or permanent]

(Ref: paroxysmal AF)

Mean (sd), 4.7 ± 4.6 y

uOR (CI), 1.50 (0.90–2.60)

 11*†

de Vos, 2010

35 European countries

1219

Paroxysmal

AF and first detected AF in whom sinus rhythm restored spontaneously or after treatment during admission

64

43

NR

Non-paroxysmal AF [i.e., persistent or permanent] (Ref: paroxysmal AF)

Mean, 1 y

uOR (CI), 1.42 (0.94–2.14)

 12*†

de Vos, 2012

21 countries in Europe, North and South America, Asia

2137

Paroxysmal and first-detected AF

65 ± 12

NR

NR

Non-paroxysmal AF [i.e., persistent or permanent] (Ref: paroxysmal AF)

Mean, 1 y

uOR (CI), 1.18 (0.86–1.63)

 13

Echouffo-Tcheugui, 2017

United States

6575

Paroxysmal or persistent AF

75

42.6

Previous medical history or new DM diagnosis during enrollment visit

AF progression [i.e., paroxysmal to persistent or permanent, persistent to permanent] (Ref: paroxysmal or persistent AF)

Median (IQR), 2.78 (1.95–3) y

Model 1

uOR (CI), 1.05 (0.93–1.17)

Age, sex, race, medical history, cardiovascular history

Model 2

aOR (CI), 0.96 (0.85, 1.08)

 14

Schnabel, 2018

7 European countries

2151

Paroxysmal or persistent AF

72

39.9

NR

AF progression [i.e., paroxysmal to persistent or permanent, persistent to permanent] (Ref: paroxysmal or persistent AF)

Mean, 1 y

uOR (CI), 1.22 (0.98–1.52)

Age, sex, country

aOR (CI), 1.23 (0.98–1.53)

AF duration, HF, hyperthyroidism, no sinus rhythm, cardioversion, valvular heart disease

aOR (CI), 1.29 (1.01–1.65)

  1. DM diabetes mellitus, HR hazard ratio, AF atrial fibrillation, BMI body mass index, HTN hypertension, aHR adjusted hazard ratio, CI 95% confidence interval, uHR unadjusted hazard ratio, PAF paroxysmal atrial fibrillation, aOR adjusted odds ratio, uOR unadjusted odds ratio, NR not reported, CHD coronary heart disease, LVH left ventricular hypertrophy, HF heart failure, SBP systolic blood pressure, DBP diastolic blood pressure, CHD coronary heart disease, MI myocardial infarction, y years, IQR interquartile range, Ref reference, sd standard deviation
  2. *The studies investigated the association of diabetes with nonparoxysmal AF (compared to paroxysmal AF)
  3. **Median follow-up time of the entire cohort of 34,720 women without AF at baseline, of which 1039 developed AF over follow-up
  4. ***HRs of developing non-paroxysmal AF compared to paroxysmal AF were calculated based on: (i) HR of developing paroxysmal AF compared to no AF; (ii) HR of developing non-paroxysmal AF compared to no AF; (iii) p-value from likelihood ratio tests of the null hypothesis that diabetes has an equal effect on the development of paroxysmal vs non-paroxysmal AF
  5. Odds ratios for developing non-paroxysmal AF compared to paroxysmal AF were calculated manually