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Whitfield B, Sierra G, Lerma K, Goyal V, Thaxton L, Kumar B, Gilbert A, White K. Abortion Return Rates and Wait Times Before and After Texas' Executive Order Banning Abortion During COVID-19. Am J Public Health 2024; 114:1013-1023. [PMID: 39146519 PMCID: PMC11375354 DOI: 10.2105/ajph.2024.307747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Objectives. To assess the associations between the executive order that Texas governor Greg Abbott issued on March 22, 2020, postponing procedures deemed not immediately medically necessary, and patients' access to abortion care in Texas. Methods. We used 17 515 individual-level patient records from 13 Texas abortion facilities for matched periods in 2019 and 2020 to examine differences in return rates for abortion after completion of a state-mandated ultrasound and median wait times between ultrasound and abortion visits for those who returned. Results. Patients were less likely to return for an abortion if they had an ultrasound while the executive order was under effect (82.8%) than in the same period in 2019 (90.4%; adjusted odds ratio = 2.06; 95% confidence interval = 1.12, 3.81). Compared with patients at or before 10.0 weeks' gestation at ultrasound, patients at more than 10 weeks' gestation had higher odds of not returning for an abortion or, if they returned, experienced greater wait times between ultrasound and abortion visits. Conclusions. Texas' executive order prohibiting abortion during the COVID-19 pandemic disrupted patients' access to care and disproportionately affected patients who were past 10 weeks' gestation. (Am J Public Health. 2024;114(10):1013-1023. https://doi.org/10.2105/AJPH.2024.307747).
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Affiliation(s)
- Brooke Whitfield
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Gracia Sierra
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Klaira Lerma
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Vinita Goyal
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Lauren Thaxton
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Bhavik Kumar
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Allison Gilbert
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
| | - Kari White
- Brooke Whitfield, Gracia Sierra, Klaira Lerma, Vinita Goyal, and Kari White are with the Population Research Center, University of Texas at Austin. Lauren Thaxton is with Dell Medical School, University of Texas at Austin. Bhavik Kumar is with Planned Parenthood Gulf Coast, Houston, TX. Allison Gilbert is with Southwestern Women's Surgery Center, Dallas, TX
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Kravitz E, Chen J, Wu J, Bromwich K, Koelper N, McAllister A, Sonalkar S. Adaptations to COVID-19 by US abortion clinics: Analysis of Society of Family Planning survey data. Contraception 2024:110692. [PMID: 39182808 DOI: 10.1016/j.contraception.2024.110692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 03/16/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
OBJECTIVE Analyze changes in abortion practices during the early coronavirus disease 2019 (COVID-19) pandemic. STUDY DESIGN Sites recruited by Society of Family Planning participated in a longitudinal descriptive analysis comprising three surveys between February and October 2020. Average monthly total and medication abortion volume was analyzed by χ2 and linear regression. RESULTS Total average volume of abortion services did not change among participating sites (p = 0.79). Volume and proportion of medication abortion increased over the study period (p = 0.02, p < 0.01). CONCLUSIONS The early COVID-19 pandemic marked a shift toward medication abortion. IMPLICATIONS Our findings are interlaced in a national trend predating the Dobbs ruling, likely accelerated by the COVID-19 pandemic.
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Affiliation(s)
- Elizabeth Kravitz
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States.
| | - Jessica Chen
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Jessica Wu
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Kira Bromwich
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Nathanael Koelper
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Arden McAllister
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Sarita Sonalkar
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
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do Nascimento MI, Rabelo Silva TG, de Aguiar Mello Nascimento VJ, Ortiz Flores LP, McBenedict B. COVID-19 Pandemic and Hospitalizations due to Abortion among 10- to 14-Year-Old Girls in Brazil. PORTUGUESE JOURNAL OF PUBLIC HEALTH 2024; 42:23-32. [PMID: 39469488 PMCID: PMC11499666 DOI: 10.1159/000535227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 11/07/2023] [Indexed: 10/30/2024] Open
Abstract
Introduction Various non-pharmacological interventions to prevent coronavirus dissemination were implemented during the COVID-19 pandemic, including school closures. The effect of these interventions on particular aspects of people's lives such as sexual and reproductive health outcomes has not been adequately discussed. The objective of the study was to compare the monthly hospital admission rates due to abortion before and during school closure. Methods We used an interrupted time series (IES) design to estimate the hospital admission rates before and during the school closure (intervention in March 2020) period. The analysis was performed considering all girls from age groups of interest and by stratifying the age groups according to skin color (white and non-white) in which the non-white category comprised both the black and mixed ethnicity together. Coefficients and 95% confidence intervals (95% CIs) were calculated using segmented linear regression models. Results The results showed positive and statistically significant coefficients, suggesting post-intervention trend changes both in the population as a whole (coefficient: 0.07; 95% CI: 0.02; 0.11) and the non-white population group (coefficient: 0.07; 95% CI: 0.03; 0.11), indicating that the monthly hospital admission rates increased over the post-intervention period compared to baseline pre-intervention period. The ITS analysis did not detect statistically significant trend changes (coefficient: 0.02; 95% CI: -0.01; 0.05) in abortion admission rates in the white girl population group. Conclusion The hospitalizations in Brazil due to abortions in 10- to 14-year-old girls increased during the COVID-19 pandemic in 2020 compared to 2019, and the number of abortions was higher in the non-white population than the white population. Furthermore, recognizing that the implementation of school closure has affected the minority population differentially can help develop more effective actions to face other future similar situations.
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Affiliation(s)
- Maria Isabel do Nascimento
- Faculdade de Medicina, Departamento de Cirurgia Geral e Especializada, Universidade Federal Fluminense, Niterói, Brazil
| | | | | | - Luis Patricio Ortiz Flores
- Faculdade de Economia, Contábeis e Atuária, Pontifícia Universidade Católica de São Paulo, São Paulo, Brazil
| | - Billy McBenedict
- Faculdade de Medicina. Universidade Federal Fluminense, Niterói, Brazil
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Huslage M, Jones A, Wallis D, Scoresby K. Resilience Amid Chaos: Abortion Provision Across the United States During COVID-19. J Womens Health (Larchmt) 2024; 33:294-300. [PMID: 38061048 DOI: 10.1089/jwh.2023.0149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024] Open
Abstract
Background: Pregnant people face many challenges to obtaining abortion services, including cost, stigma, administrative requirements, and legislative barriers. In 2020, the COVID-19 pandemic added additional barriers for clients and abortion service providers to overcome. Methods: The current study uses the Family Planning Visits During COVID-19 longitudinal dataset to explore abortion service provision from April 2020 through November 2020 from a sample of clinics (N = 63) providing abortion services across the United States. Results: Clinics in the sample were 49.2% academic/hospital-based, based in urban counties (96.8%), with a majority (82.5%) utilizing in-house providers for abortion care. Results show that the majority of clinics (59%) experienced staffing changes in response to COVID-19, including staff and clinicians who took extended leave, quit, were furloughed, or hired. Although the volume of overall abortion service provision decreased March through July 2020, the volume returned to pre-COVID numbers by August and surpassed pre-COVID volume in September and October 2020. Conclusion: Findings from this study demonstrate the adaptability and resilience shown by providers to ensure the continued availability of abortion services. Strategies adopted during COVID-19, such as telehealth and mail-delivery of abortion medication, may prove useful in a post-Roe legislative landscape.
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Affiliation(s)
- Melody Huslage
- School of Social Work, University of Nevada, Reno, Nevada, USA
| | - Aubrey Jones
- College of Social Work, University of Kentucky, Lexington, Kentucky, USA
| | - Dorothy Wallis
- Department of Social Work, Utah State University, Logan, Utah, USA
| | - Kristel Scoresby
- College of Social Work, University of Kentucky, Lexington, Kentucky, USA
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Keefe-Oates B, Fulcher I, Fortin J, Goldberg AB, Chen JT, Gottlieb B, Janiak E. Use of Abortion Services in Massachusetts After the Dobbs Decision Among In-State vs Out-of-State Residents. JAMA Netw Open 2023; 6:e2332400. [PMID: 37672274 PMCID: PMC10483311 DOI: 10.1001/jamanetworkopen.2023.32400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 07/30/2023] [Indexed: 09/07/2023] Open
Abstract
This cohort study compares observed vs expected abortion counts after Dobbs in Massachusetts among in-state vs out-of-state residents.
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Affiliation(s)
- Brianna Keefe-Oates
- Department of Social and Behavioral Sciences, Harvard TH Chan School of Public Health, Boston, Massachusetts
| | - Isabel Fulcher
- Department of Research, Planned Parenthood League of Massachusetts, Boston
| | - Jennifer Fortin
- Department of Research, Planned Parenthood League of Massachusetts, Boston
| | - Alisa B. Goldberg
- Department of Research, Planned Parenthood League of Massachusetts, Boston
| | - Jarvis T. Chen
- Department of Social and Behavioral Sciences, Harvard TH Chan School of Public Health, Boston, Massachusetts
| | - Barbara Gottlieb
- Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Elizabeth Janiak
- Department of Social and Behavioral Sciences, Harvard TH Chan School of Public Health, Boston, Massachusetts
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Diniz D, Medeiros M, Madeiro A. National Abortion Survey - Brazil, 2021. CIENCIA & SAUDE COLETIVA 2023; 28:1601-1606. [PMID: 37255138 DOI: 10.1590/1413-81232023286.01892023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 03/20/2023] [Indexed: 06/01/2023] Open
Abstract
The National Abortion Survey 2021 (PNA 2021) utilized face-to-face structured interviews and a self-administered questionnaire placed in a sealed box to collect data on abortions in Brazil. Interviews were held with a nationally representative sample of 2,000 women, randomly selected from among literate women ages 18 to 39 residing in urban areas. We compared some of the results with previous waves of the survey, PNA 2010 and PNA 2016. Findings show that abortion is in decline but remains a major public health issue. Around 10% of the women interviewed in 2021 said they had had at least one abortion in their lives (compared to 15% in 2010). We estimate that nearly one in every seven women (15%) have had an abortion by the age of 40. We identified a decline in the proportion of women who needed to be hospitalized to finalize their abortions (55% in 2010; 43% in 2021; p = 0.003) and in the proportion of women who used medication for the abortion (48% in 2010; 39% in 2021; p = 0.028). Abortion is an event that generally happens early on in women's reproductive lives: the PNA 2021 found that 52% of women were 19 years old or younger when they had their first abortion. Higher rates were detected among respondents with lower educational levels, Black and Indigenous women, and women residing in poorer regions.
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Affiliation(s)
- Debora Diniz
- Faculdade de Direito, Universidade de Brasília. Campus Universitário Darcy Ribeiro, Asa Norte. 70904-970 Brasília DF Brasil.
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Bell SO, Berger BO, Sufrin C, Dozier JL, Burke AE. An exploratory study of COVID-19-related changes in abortion service availability and use in Washington, DC, Maryland, and Virginia. PERSPECTIVES ON SEXUAL AND REPRODUCTIVE HEALTH 2023; 55:12-22. [PMID: 36751866 DOI: 10.1363/psrh.12220] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
OBJECTIVES This exploratory study aimed to assess COVID-19-related changes in abortion service availability and use in Washington, DC, Maryland, and Virginia. DESIGN Data came from a convenience sample of eight abortion clinics in this region. We implemented a cross-sectional survey and collected retrospective aggregate monthly abortion data overall and by facility type, abortion type, and patient characteristics for March 2019-August 2020. We evaluated changes in the distribution of the total number of patients for March-August in 2019 compared to March-August 2020. We also conducted segmented regression analyses and produced scatter plots of monthly abortion patients overall and by facility type, abortion type, and patient characteristics, with separate fitted regression lines from the segmented regression models for the pre- and during-COVID-19 periods. RESULTS Five clinics reported a reduced number of appointments early in the pandemic while four reported increased call volume. There were declines in the monthly abortion trend at hospital-based clinics at the outset of the pandemic. Monthly number of medication abortions increased from March 2020 through August 2020 compared to pre-COVID-19 trends while instrumentation abortions 11 up to 19 weeks decreased. The share of abortions to Black individuals increased during the early phase of the pandemic, as did the monthly trend in abortions among this group. We also saw changes in payment type, with declines in patients paying out-of-pocket. CONCLUSIONS Results revealed differences in abortion services, numbers, and types during the early stages of the COVID-19 pandemic in Washington, DC, Maryland, and Virginia.
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Affiliation(s)
- Suzanne O Bell
- Department of Population, Family and Reproductive Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Blair O Berger
- Department of Population, Family and Reproductive Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Carolyn Sufrin
- Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Health, Behavior, and Society, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jessica L Dozier
- Department of Population, Family and Reproductive Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Anne E Burke
- Department of Population, Family and Reproductive Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Zhang X, Yin R, Zheng M, Kong D, Chen W. Impact of COVID-19 on health services utilization in mainland China and its different regions based on S-ARIMA predictions. PLOS GLOBAL PUBLIC HEALTH 2023; 3:e0001044. [PMID: 36962843 PMCID: PMC10021243 DOI: 10.1371/journal.pgph.0001044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 11/28/2022] [Indexed: 06/18/2023]
Abstract
Global health services are disrupted by the COVID-19 pandemic. We evaluated extent and duration of impacts of the pandemic on health services utilization in different economically developed regions of mainland China. Based on monthly health services utilization data in China, we used Seasonal Autoregressive Integrated Moving Average (S-ARIMA) models to predict outpatient and emergency department visits to hospitals (OEH visits) per capita without pandemic. The impacts were evaluated by three dimensions:1) absolute instant impacts were evaluated by difference between predicted and actual OEH visits per capita in February 2020 and relative instant impacts were the ratio of absolute impacts to baseline OEH visits per capita; 2) absolute and relative accumulative impacts from February 2020 to March 2021; 3) duration of impacts was estimated by time that actual OEH visits per capita returned to its predicted value. From February 2020 to March 2021, the COVID-19 pandemic reduced OEH visits by 0.4676 per capita, equivalent to 659,453,647 visits, corresponding to a decrease of 15.52% relative to the pre-pandemic average annual level in mainland China. The instant impacts in central, northeast, east and west China were 0.1279, 0.1265, 0.1215, and 0.0986 visits per capita, respectively; and corresponding relative impacts were 77.63%, 66.16%, 44.39%, and 50.57%, respectively. The accumulative impacts in northeast, east, west and central China were up to 0.5898, 0.4459, 0.3523, and 0.3324 visits per capita, respectively; and corresponding relative impacts were 23.72%, 12.53%, 13.91%, and 16.48%, respectively. The OEH visits per capita has returned back to predicted values within the first 2, 6, 9, 9 months for east, central, west and northeast China, respectively. Less economically developed areas were affected for a longer time. Safe and equitable access to health services, needs paying great attention especially for undeveloped areas.
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Affiliation(s)
- Xiangliang Zhang
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Center for Migrant Health Policy, Sun Yat-sen University, Guangzhou, China
| | - Rong Yin
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Center for Migrant Health Policy, Sun Yat-sen University, Guangzhou, China
| | - Meng Zheng
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Center for Migrant Health Policy, Sun Yat-sen University, Guangzhou, China
| | - Di Kong
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Center for Migrant Health Policy, Sun Yat-sen University, Guangzhou, China
| | - Wen Chen
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Center for Migrant Health Policy, Sun Yat-sen University, Guangzhou, China
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Impact of the COVID-19 pandemic and the emergency measures on abortion care taken during this period in a French region (Provence Alpes Côte d'Azur). J Gynecol Obstet Hum Reprod 2022; 51:102478. [PMID: 36108936 PMCID: PMC9467918 DOI: 10.1016/j.jogoh.2022.102478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/10/2022] [Indexed: 11/20/2022]
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Zhang Z, Wang X, Wang W, Zhang J, Shan L, Li Y. The impact of the coronavirus disease 2019 pandemic on abortion access and pre-abortion mental health in Shanghai. Int J Gynaecol Obstet 2022; 160:1035-1041. [PMID: 36278866 PMCID: PMC9874749 DOI: 10.1002/ijgo.14516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/07/2022] [Accepted: 10/13/2022] [Indexed: 01/27/2023]
Abstract
OBJECTIVE To understand the barriers to abortion in Shanghai during the COVID-19 pandemic, and to compare pre-abortion mental health status before and during the crisis. METHODS In this case-control study, two groups of women seeking abortion (age ≥18 years, pregnancy duration <98 days) were recruited from March to September, 2021 (n = 1070) and from February to April 2022 (n = 625). The evaluation included COVID-19-related abortion stress questions, the Symptom Checklist-90 Revised questionnaire, the Pittsburgh Sleep Quality Index (PSQI), and the Family Environment Scale Chinese version. The researchers conducted interviews and collected questionnaires. RESULTS The median pregnancy duration at abortion among women during the pandemic was 65 days, compared with 51 days in the pre-pandemic group (P < 0.001). Anxiety and depression symptoms increased during the crisis (P < 0.001). Sleep disturbances were more common. Higher PSQI scores were related to increased anxiety and depression symptoms. A more negative family climate was described during the pandemic. CONCLUSION During the COVID-19 pandemic, abortion access was delayed and pre-abortion mental disorders increased. More attention should be paid to the mental health of women seeking abortions, and innovations should be promoted to ensure abortion services without delay.
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Affiliation(s)
- Zhifang Zhang
- Department of Obstetrics and Gynecology, Shanghai General HospitalShanghai Jiao Tong University, School of MedicineShanghaiChina
| | - Xiaoyun Wang
- Department of Obstetrics and Gynecology, Shanghai General HospitalShanghai Jiao Tong University, School of MedicineShanghaiChina
| | - Wei Wang
- Department of Obstetrics and Gynecology, Shanghai General HospitalShanghai Jiao Tong University, School of MedicineShanghaiChina
| | | | - Liyun Shan
- Department of Obstetrics and Gynecology, Shanghai General HospitalShanghai Jiao Tong University, School of MedicineShanghaiChina
| | - Yanli Li
- Department of Obstetrics and Gynecology, Shanghai General HospitalShanghai Jiao Tong University, School of MedicineShanghaiChina
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