Evidence map›Paper›PMID 35260953›Full record

ArticleMaternal and child health journal2022

Interpregnancy Interval and Birth Outcomes: A Propensity Matching Study in the California Population.

Jayme L Congdon, Rebecca J Baer, Jennet Arcara, Sky K Feuer, Anu Manchikanti Gómez, Deborah Karasek, Scott P Oltman, Matthew S Pantell, Kelli Ryckman, Laura Jelliffe-Pawlowski

Open access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Maternal and child health journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 2 pooled it
2.2field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 11 citations in OpenAlex.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 1 country.

Jayme L CongdonDepartment of Pediatrics, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA. jayme.congdon@ucsf.edu.ORCID http://orcid.org/0000-0001-6424-2189
Rebecca J BaerDepartment of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.
Jennet ArcaraSexual Health and Reproductive Equity Program, School of Social Welfare, University of California, Berkeley, 120 Haviland Hall #7400, Berkeley, CA, 94720-7400, USA.
Sky K FeuerCalifornia Preterm Birth Initiative, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA.
Anu Manchikanti GómezSexual Health and Reproductive Equity Program, School of Social Welfare, University of California, Berkeley, 120 Haviland Hall #7400, Berkeley, CA, 94720-7400, USA.
Deborah KarasekCalifornia Preterm Birth Initiative, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA.
Scott P OltmanCalifornia Preterm Birth Initiative, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA.
Matthew S PantellDepartment of Pediatrics, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA.
Kelli RyckmanDepartments of Epidemiology and Pediatrics, University of Iowa, 145 N. Riverside Drive, Iowa City, IA, 52242, USA.
Laura Jelliffe-PawlowskiCalifornia Preterm Birth Initiative, University of California, San Francisco, 550 16th Street, San Francisco, CA, 94158, USA.
University of California, San Francisco · USUniversity of California, Berkeley · USUniversity of Iowa · US

Funding

Institutional Career Development Core SupplementKL2TR001870 · NCATS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI KANAYA, ALKA M., SARKAR, URMIMALA · 2016 to 2025
$19.7M
UCSF/Kaiser-DOR Program for Developing Independent Women's Health ResearchersK12HD052163 · NICHD · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ADLER, NANCY E, BRINDIS, CLAIRE D. · 2005 to 2023
$9.3M
NCATS NIH HHS KL2 TR001870NICHD NIH HHS K12 HD052163
6 · The paper itself

Abstract

introductionPrevious studies that used traditional multivariable and sibling matched analyses to investigate interpregnancy interval (IPI) and birth outcomes have reached mixed conclusions about a minimum recommended IPI, raising concerns about confounding. Our objective was to isolate the contribution of interpregnancy interval to the risk for adverse birth outcomes using propensity score matching.

methodsFor this retrospective cohort study, data were drawn from a California Department of Health Care Access and Information database with linked vital records and hospital discharge records (2007-2012). We compared short IPIs of < 6, 6-11, and 12-17 months to a referent IPI of 18-23 months using 1:1 exact propensity score matching on 13 maternal sociodemographic and clinical factors. We used logistic regression to calculate the odds of preterm birth, early-term birth, and small for gestational age (SGA).

resultsOf 144,733 women, 73.6% had IPIs < 18 months, 5.5% delivered preterm, 27.0% delivered early-term, and 6.0% had SGA infants. In the propensity matched sample (n = 83,788), odds of preterm birth were increased among women with IPI < 6 and 6-11 months (OR 1.89, 95% CI 1.71-2.0; OR 1.22, 95% CI 1.13-1.31, respectively) and not with IPI 12-17 months (OR 1.01, 95% CI 0.94-1.09); a similar pattern emerged for early-term birth. The odds of SGA were slightly elevated only for intervals < 6 months (OR 1.10, 95% CI 1.00-1.20, p < .05). DISCUSSION: This study demonstrates a dose response association between short IPI and adverse birth outcomes, with no increased risk beyond 12 months. Findings suggest that longer IPI recommendations may be overly proscriptive.

Indexed as

Birth IntervalsPremature BirthFemaleFetal Growth RetardationHumansInfantInfant, NewbornInfant, Small for Gestational AgeMalePregnancyRetrospective StudiesRisk FactorsBirth intervalsBirth weightFamily planningPregnancy outcomePremature birth

Identifiers

PMID35260953
PMCPMC9023393
OpenAlexW4220973897

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.