Pregnancy dating by fetal crown-rump length: a systematic review of charts.
BACKGROUND: Fetal crown-rump length (CRL) measurement by ultrasound in the first trimester is the standard method for pregnancy dating; however, a multitude of CRL equations to estimate gestational age (GA) are reported in the literature. OBJECTIVE: To evaluate the methodological quality used in stu...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2014
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| _version_ | 1797102943533531136 |
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| author | Napolitano, R Dhami, J Ohuma, E Ioannou, C Conde-Agudelo, A Kennedy, S Villar, J Papageorghiou, A |
| author_facet | Napolitano, R Dhami, J Ohuma, E Ioannou, C Conde-Agudelo, A Kennedy, S Villar, J Papageorghiou, A |
| author_sort | Napolitano, R |
| collection | OXFORD |
| description | BACKGROUND: Fetal crown-rump length (CRL) measurement by ultrasound in the first trimester is the standard method for pregnancy dating; however, a multitude of CRL equations to estimate gestational age (GA) are reported in the literature. OBJECTIVE: To evaluate the methodological quality used in studies reporting CRL equations to estimate GA using a set of predefined criteria. SEARCH STRATEGY: Searches of MEDLINE, EMBASE, and CINAHL databases, from 1948 to 31 January 2011, and secondary reference sources, were performed. SELECTION CRITERIA: Observational ultrasound studies, where the primary aim was to create equations for GA estimation using a CRL measurement. DATA COLLECTION AND ANALYSIS: Included studies were scored against predefined independently agreed methodological criteria: an overall quality score was calculated for each study. MAIN RESULTS: The searches yielded 1142 citations. Two reviewers screened the papers and independently assessed the full-text versions of 29 eligible studies. The highest potential for bias was noted in inclusion and exclusion criteria, and in maternal demographic characteristics. No studies had systematic ultrasound quality-control measures. The four studies with the highest scores (lowest risk of bias) satisfied 18 or more of the 29 criteria; these showed lower variation in GA estimation than the remaining, lower-scoring studies. This was particularly evident at the extremes of GA. AUTHOR'S CONCLUSIONS: Considerable methodological heterogeneity and limitations exist in studies reporting CRL equations for estimating GA, and these result in a wide range of estimated GAs for any given CRL; however, when studies with the highest methodological quality are used, this range is reduced. |
| first_indexed | 2024-03-07T06:13:01Z |
| format | Journal article |
| id | oxford-uuid:f02b54f7-6f55-44d0-8d3d-923968b56ff7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:13:01Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:f02b54f7-6f55-44d0-8d3d-923968b56ff72022-03-27T11:45:46ZPregnancy dating by fetal crown-rump length: a systematic review of charts.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f02b54f7-6f55-44d0-8d3d-923968b56ff7EnglishSymplectic Elements at Oxford2014Napolitano, RDhami, JOhuma, EIoannou, CConde-Agudelo, AKennedy, SVillar, JPapageorghiou, ABACKGROUND: Fetal crown-rump length (CRL) measurement by ultrasound in the first trimester is the standard method for pregnancy dating; however, a multitude of CRL equations to estimate gestational age (GA) are reported in the literature. OBJECTIVE: To evaluate the methodological quality used in studies reporting CRL equations to estimate GA using a set of predefined criteria. SEARCH STRATEGY: Searches of MEDLINE, EMBASE, and CINAHL databases, from 1948 to 31 January 2011, and secondary reference sources, were performed. SELECTION CRITERIA: Observational ultrasound studies, where the primary aim was to create equations for GA estimation using a CRL measurement. DATA COLLECTION AND ANALYSIS: Included studies were scored against predefined independently agreed methodological criteria: an overall quality score was calculated for each study. MAIN RESULTS: The searches yielded 1142 citations. Two reviewers screened the papers and independently assessed the full-text versions of 29 eligible studies. The highest potential for bias was noted in inclusion and exclusion criteria, and in maternal demographic characteristics. No studies had systematic ultrasound quality-control measures. The four studies with the highest scores (lowest risk of bias) satisfied 18 or more of the 29 criteria; these showed lower variation in GA estimation than the remaining, lower-scoring studies. This was particularly evident at the extremes of GA. AUTHOR'S CONCLUSIONS: Considerable methodological heterogeneity and limitations exist in studies reporting CRL equations for estimating GA, and these result in a wide range of estimated GAs for any given CRL; however, when studies with the highest methodological quality are used, this range is reduced. |
| spellingShingle | Napolitano, R Dhami, J Ohuma, E Ioannou, C Conde-Agudelo, A Kennedy, S Villar, J Papageorghiou, A Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title | Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title_full | Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title_fullStr | Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title_full_unstemmed | Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title_short | Pregnancy dating by fetal crown-rump length: a systematic review of charts. |
| title_sort | pregnancy dating by fetal crown rump length a systematic review of charts |
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