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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