Table 1 Overview of the characteristics of the included studies.

From: A systematic review and meta-analysis of effects of menopausal hormone therapy on cardiovascular diseases

 

Randomized controlled trials (n = 26 including 20 trials)

Observational studies (n = 47)

N (%)

N (%)

Ethnic group

Europe

7 (26.9)

29 (61.7)

North America

19 (73.1)

12 (25.5)

Rest of world

6 (12.8)

Publication year

 ≤ 2006

18 (69.2)

18 (38.3)

 > 2006

8 (30.8)

29 (61.7)

Age at baseline, years (median, range)

63.6 (49.7–75.0)

60.6 (48.8–77.0)

Timing of initiation of MHT*,

Reported

22 (84.6)

36 (76.6)

Unreported

4 (15.4)

11 (23.4)

Underlying diseases

With

17 (65.4)

6 (12.8)

Without

9 (34.6)

41 (87.2)

Regimen type*

Reported

19 (73.1)

29 (617)

Unreported

7 (26.9)

18 (38.3)

Route of administration*

Reported

25 (96.2)

21 (44.7)

Unreported

1 (3.8)

26 (55.3)

Duration of MHT*

Reported

26 (100.0)

12 (25.5)

Unreported

35 (74.5)

Outcomes*

All-cause death

16 (61.5)

15 (31.9)

Cardiovascular death

10 (38.5)

6 (12.8)

Stroke

12 ()

14 (29.8)

VTE

15 (57.7)

13 (27.7)

PE

7 (26.9)

4 (8.5)

MI

16 (61.5)

10 (21.3)

CHD

4 (15.4)

7 (14.9)

Angina

8 (30.8)

1 (2.1)

Revascularization

7 ()

0 (0.0)

Follow-up, years (median, range)

3.4 (0.7–18)

6.8 (1–21.5)

Study type*

Cohort study

30 (63.8)

Case–control study

13 (27.7)

Nested case–control study

5 (10.6)

  1. CHD, coronary heart disease; MHT, menopausal hormone therapy; MI, myocardial infarction; PE, pulmonary embolism; VTE, venous thromboembolism. *Individual studies often included more than one subgroup; †Women under 60 years of age or those in whom MHT was initiated within 10 years after menopause were included in the early subgroup; the others were included in the late subgroup.