Retrospective determination of chorion type in twins using a simple questionnaire
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Retrospective determination of chorion type in twins using a simple questionnaire. / Derom, Catherine; Derom, Robert; Loos, Ruth J F; Jacobs, Nele; Vlietinck, Robert.
In: Twin research : the official journal of the International Society for Twin Studies, Vol. 6, No. 1, 02.2003, p. 19-21.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Retrospective determination of chorion type in twins using a simple questionnaire
AU - Derom, Catherine
AU - Derom, Robert
AU - Loos, Ruth J F
AU - Jacobs, Nele
AU - Vlietinck, Robert
PY - 2003/2
Y1 - 2003/2
N2 - This study investigates the validity of retrospective determination of chorion type by asking the question to the mother about the number of placentas. In the "East Flanders Prospective Twin Survey" (EFPTS), accurate information on the placentation and zygosity of the multiples was collected prospectively. The mothers of 231 monozygotic (95 dichorionic and 136 monochorionic) twins and 255 dizygotic twins were asked to fill in a simple questionnaire regarding 1). the zygosity and 2). the number of placentas of their twins. The accuracy of the response to the question on "the number of placentas" was 60% for monozygotic twins and 37% for dizygotic twins. The accuracy of the response to the question on the zygosity of the twins was 93% for monozygotic and 95% for dizygotic twins. If the questionnaire was used for the determination of chorion type, a total of 31 monozygotic twins (13%) should have been assigned as dichorionic on the fact that there were two separate placentas. Of these, 10 (32%) are monochorionic and 12 (39%) were falsely reported as having two placentas. We conclude from these findings that this simple questionnaire method is unreliable for the retrospective determination of the chorion type.
AB - This study investigates the validity of retrospective determination of chorion type by asking the question to the mother about the number of placentas. In the "East Flanders Prospective Twin Survey" (EFPTS), accurate information on the placentation and zygosity of the multiples was collected prospectively. The mothers of 231 monozygotic (95 dichorionic and 136 monochorionic) twins and 255 dizygotic twins were asked to fill in a simple questionnaire regarding 1). the zygosity and 2). the number of placentas of their twins. The accuracy of the response to the question on "the number of placentas" was 60% for monozygotic twins and 37% for dizygotic twins. The accuracy of the response to the question on the zygosity of the twins was 93% for monozygotic and 95% for dizygotic twins. If the questionnaire was used for the determination of chorion type, a total of 31 monozygotic twins (13%) should have been assigned as dichorionic on the fact that there were two separate placentas. Of these, 10 (32%) are monochorionic and 12 (39%) were falsely reported as having two placentas. We conclude from these findings that this simple questionnaire method is unreliable for the retrospective determination of the chorion type.
KW - Chorion
KW - Female
KW - Humans
KW - Placenta
KW - Pregnancy
KW - Retrospective Studies
KW - Surveys and Questionnaires
KW - Twins, Dizygotic
KW - Twins, Monozygotic
U2 - 10.1375/136905203762687852
DO - 10.1375/136905203762687852
M3 - Journal article
C2 - 12626224
VL - 6
SP - 19
EP - 21
JO - Twin Research
JF - Twin Research
SN - 1369-0523
IS - 1
ER -
ID: 258333908