Table 2 Numbers of cases and controls excluded by each requirement (1-8)

Start

7,795

2,495,994

(1) Antithrombotic agent within 14 days

2,964

-

(2) Father and mother were not registered in the Multi-Generation Register

971

404,747

(3) Individuals with previously registered diagnoses of any type of VTE

1,560

15,334

(4) Hysterectomy

240

17,362

(4) Bilateral oophorectomy/Unilateral oophorectomy twice

75

3,817

(4) Sterilization

242

29.331

(4) Coronary heart disease/Heart failure/Cerebrovascular disease

191

6,915

(5) Cancer

373

8,957

(6) Infertility

240

37,239

(7) Pregnancy

343

56,043

(8) Women who stopped use of any contraceptives prior to the VTE diagnosis

982

312,099

Unable to match with 5 controls

98

-

Included in the analysis

2,311

11,555