PMID- 34268229
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240402
IS  - 1016-1430 (Print)
IS  - 2251-6840 (Electronic)
IS  - 1016-1430 (Linking)
VI  - 35
DP  - 2021
TI  - Survival of very preterm infants in the Islamic Republic of Iran: A 
      population-based retrospective cohort study.
PG  - 41
LID - 10.47176/mjiri.35.41 [doi]
AB  - Background: Estimation of the survival of very preterm infants is necessary to 
      make decisions and design interventions in order to improve their quality of 
      care. This survey aimed to estimate the survival of very preterm infants born at 
      23 up to 33 weeks of gestational age (GA) in Iran. Methods: This population-based 
      retrospective cohort study included 8536 infants born before 33 weeks of GA, from 
      March 21st to December 22nd 2013 in Iran. The primary data were extracted from 
      the Iranian national maternal and neonatal registration network (IMAN). All 
      infants who have been discharged alive, followed up by telephone contact up to 
      one year after birth. The Kaplan-Meier and Log-rank tests were performed to 
      estimate survival and to compare survivals, respectively, using SPSS version 26 
      and R 3.5.2 softwares. Results: The overall survival was estimated at 56.70% (95% 
      C.I: 55.60%-57.80%) at the end of the follow-up period. Total death rate was 
      estimated at 43.30% and was significantly decreased with increasing birth weight 
      (p<0.0001). Survival was increased significantly with increasing GA (p<0.0001), 
      from 5.7% at 23 weeks to 79.6% at 32 weeks. The estimated cumulative proportion 
      of death until the end of the neonatal period had a decreasing trend and then had 
      a steady trend until the end of the follow-up period. The hazard ratio of 
      quadruple or more birth and GA were 1.46 (p=0.021) and 0.83 (p<0.001), 
      respectively. Conclusion: The overall estimated survival of very preterm infants 
      was not high. Even with modern perinatal technology and care, early deaths of 
      very preterm infants were still common.
CI  - (c) 2021 Iran University of Medical Sciences.
FAU - Akrami, Forouzan
AU  - Akrami F
AD  - Neonatal Health Research Center, Research Institute for Children's Health, Shahid 
      Beheshti University of Medical Sciences, Tehran, Iran.
FAU - Mohammadi, Gohar
AU  - Mohammadi G
AD  - Neonatal Health Research Center, Research Institute for Children's Health, Shahid 
      Beheshti University of Medical Sciences, Tehran, Iran.
AD  - Administration and Resources Development affairs, Shahid Beheshti University of 
      Medical Sciences, Tehran, Iran.
FAU - Azizmohammad Looha, Mehdi
AU  - Azizmohammad Looha M
AD  - Department of Biostatistics, Faculty of Paramedical Sciences, Shahid Beheshti 
      University of Medical Sciences, Tehran, Iran.
FAU - Habibelahi, Abbas
AU  - Habibelahi A
AD  - Neonatal Health Office, Deputy of Public Health, Ministry of Health and Medical 
      Education, Tehran, Iran.
FAU - Mehrabi, Yadollah
AU  - Mehrabi Y
AD  - Department of Epidemiology, School of Public Health and Safety, Shahid Beheshti 
      University of Medical Sciences, Tehran, Iran.
FAU - Delbarpoor Ahmadi, Shahnaz
AU  - Delbarpoor Ahmadi S
AD  - Deputy of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, 
      Iran.
FAU - Heidarzadeh, Mohammad
AU  - Heidarzadeh M
AUID- ORCID: 0000-0002-8265-7748
AD  - Department of Pediatrics, Faculty of Medicine, Tabriz University of Medical 
      Sciences, Tabriz, Iran.
AD  - Deputy of Public Health, Ministry of Health and Medical Education, Tehran, Iran.
LA  - eng
PT  - Journal Article
DEP - 20210329
PL  - Iran
TA  - Med J Islam Repub Iran
JT  - Medical journal of the Islamic Republic of Iran
JID - 8910777
PMC - PMC8271226
OTO - NOTNLM
OT  - Death Rate
OT  - Iran
OT  - Preterm Birth
OT  - Survival
COIS- Conflicts of Interest: None declared
EDAT- 2021/07/17 06:00
MHDA- 2021/07/17 06:01
PMCR- 2021/03/29
CRDT- 2021/07/16 06:40
PHST- 2020/03/06 00:00 [received]
PHST- 2021/07/16 06:40 [entrez]
PHST- 2021/07/17 06:00 [pubmed]
PHST- 2021/07/17 06:01 [medline]
PHST- 2021/03/29 00:00 [pmc-release]
AID - 10.47176/mjiri.35.41 [doi]
PST - epublish
SO  - Med J Islam Repub Iran. 2021 Mar 29;35:41. doi: 10.47176/mjiri.35.41. eCollection 
      2021.