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Table 1 A cohort of studies performed in a nationwide Consortium on studies in obstetrics and gynaecology in the Netherlands.

From: IMproving PArticipation of patients in Clinical Trials - rationale and design of IMPACT

Nr

Trial

Population

Sample size

1

Amphia

Women with a multiple pregnancy before 20 weeks pregnancy

720

2

Hypitat II

Women with pregnancy induced hypertension or mild pre-eclampia at 34-37 weeks gestation

400

3

Digitat

Women with a singleton pregnancy at 36 completed weeks of gestation or more

626

4

Ppromexil

Women with preterm prelabour rupture of membranes between 34 and 37 weeks gestation

520

5

Stan

Women in labour over 36 weeks of gestation with an indication for CTG monitoring

2400

6

Apostel 1

Women with threatened preterm labour at 24-34 weeks gestation.

220

7

Apostel 2

Women with threatened preterm labour at 26-32+2 weeks gestation.

400

8

TRIPLE P

Women with a singleton pregnancy

1920

9

Probaat

Women ≥ 37 weeks of gestation and Bishop score < 6

812

10

PreCare

Women with preeclampia or HELLP in previous pregnancy

250

11

WOMB

Women with >1000 mL postpartum fluxus

400

12

Truffle

Women at 26-32 weeks gestation with a fetus with intrauterine growth retardation.

500

13

Allo

Women with suspected fetal asphyxia during labour

220

14

ProTWIN

Women with a multiple pregnancy between 12 and 20 weeks gestation

660

15

Metex

Women with an extra uterine gravidity

72

16

ESEP

Women with an extra uterine gravidity in one of the tubae and a normal contralateral tuba

450

17

INeS

Couples with unexplained subfertility or a mild male factor

600

19

MOVIN'

Women with anovulation not pregnant after 6 ovulatory cycles of clomid

200

20

Bedrest

Women who undergo intra-uterin insemination

250

21

VUSIS 1

Women with stress-incontinence

100

22

PORTRET

Women with stress incontinence aged 35-80 years

400

23

CUPIDO

Women with vaginal prolaps

114

24

Pompoen

Women with postmenopausal bleeding

200