ArticleClinics (Sao Paulo, Brazil)2017
Longitudinal study of lung function in pregnant women: Influence of parity and smoking.
Article in Clinics (Sao Paulo, Brazil), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02807038 (Longitudinal Study of the Pulmonary Function Testing of Pregnant Women Exposed to Air Pollution in São Paulo), which is not on this map. Cited by 7 papers, 1 of them a synthesis that pooled it.
What it found
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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.
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.
Longitudinal Study of the Pulmonary Function Testing of Pregnant Women Exposed to Air Pollution in São Paulo
Who cites it
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.
- Safety of Performing Spirometry During Pregnancy: A Systematic Review.Advances in respiratory medicine · 2026Pooled it
- Effects of Maternal Cigarette Smoking on Pulmonary Function, Respiratory Muscle Strength, Functional Exercise Capacity, and Skeletal Muscle Oxygenation During the Second Trimester of Pregnancy.Medicina (Kaunas, Lithuania) · 2026Article
- Spirometry profiles among pregnant and non-pregnant African women: a cross-sectional study.BMC women's health · 2022Article
- Association between pregnancy and pregnancy loss with COPD in Chinese women: The China Kadoorie Biobank study.Frontiers in public health · 2022Article
- The Association of Multiparity with Lung Function and Chronic Obstructive Pulmonary Disease-Related Phenotypes.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2020Article
- Article
- Pregnancy preserves pulmonary function following influenza virus infection in C57BL/6 mice.American journal of physiology. Lung cellular and molecular physiology · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo evaluate pulmonary function in the first and third trimesters of pregnancy and analyze the influence of parity and smoking on spirometry parameters.
methodsThis longitudinal prospective study included a cohort of 120 pregnant women. The inclusion criteria were as follows: singleton pregnancy, gestational age less than 13.86 weeks, and no preexisting maternal diseases. The exclusion criteria were as follows: change of address, abortion, and inadequate spirometry testing. ClinicalTrials.gov: NCT02807038.
resultsA decrease in values of forced vital capacity and forced expiratory volume were noted in the first second from the first to third trimester. In the first and third trimesters, multiparous women demonstrated lower absolute forced vital capacity and forced expiratory volume values in the first second compared with nulliparous women (p<0.0001 and p=0.001, respectively). Multiparous women demonstrated reduced forced expiratory flow in 25% to 75% of the maneuver compared with nulliparous women in the first (p=0.005) and third (p=0.031) trimesters. The absolute values of forced expiratory flow in 25% to 75%, forced expiratory volume in the first second and predicted peak expiratory flow values in the third trimester were higher in smokers compared with nonsmokers (p=0.042, p=0.039, p=0.024, and p=0.021, respectively).
conclusionThere was a significant reduction in forced vital capacity and forced expiratory volume values in the first second during pregnancy. Parity and smoking significantly influence spirometric variables.
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Registered trials
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.