Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jan 15;59(1):74-79.
doi: 10.1007/s13312-022-2425-5. Epub 2021 May 28.

Survival Analysis: Where, Why, What and How?

Abhaya Indrayan  1 , Chandra Bhushan Tripathi  2
Affiliations

Survival Analysis: Where, Why, What and How?

Abhaya Indrayan et al. Indian Pediatr. .

Abstract

Durations of any event, such as duration of hospitalization, is usually found to have a highly skewed distribution and incomplete values due to dropouts and limited follow-up. The usual methods of statistical analysis are, therefore, not applicable. The method of survival analysis is a nonparametric method and is designed to overcome these problems. Survival is a generic term and is used for any time-to-event data. The entire survival pattern at different points in time is studied by the Kaplan-Meier method under certain conditions. Log-rank method is used to compare survival pattern in two or more groups. Hazard is the rate of occurrence of an event per unit of time and studied by Cox method. The concept of survival and all these methods of survival analysis are briefly discussed in this short note in a non-mathematical format for medical audience.

PubMed Disclaimer

Similar articles

See all similar articles

Cited by

References

    1. Hanna Y, Laliberté C, Ben Fadel N, et al. Effect of oxygen saturation targets on the incidence of bronchopulmonary dysplasia and duration of respiratory supports in extremely preterm infants. Pediatr Child Health. 2020;25:173–9. doi: 10.1093/pch/pxz058. - DOI - PMC - PubMed
    1. Bryson AE, Cabral HJ, Coles MS. Attendance of an initial follow-up visit after long-acting reversible contraception insertion and method continuation among adolescents and young adults: a retrospective study. J Pediatr Adolesc Gynecol. 2021:S1083-3188(21)00004-8. - PubMed
    1. Jha UM, Dhingra N, Raj Y, et al. Survival of children living with human immunodeficiency virus on antiretroviral therapy in Andhra Pradesh, India. Indian Pediatr. 2018;55:301–5. doi: 10.1007/s13312-018-1272-x. - DOI - PubMed
    1. Indrayan A, Malhotra RK. Medical Biostatistics, Fourth Edition. CRC Press; 2018.
    1. Wainstock T, Walfisch A, Sergienko R, Sheiner E. Maternal anemia and pediatric neurological morbidity in the offspring-Results from a population based cohort study. Early Hum Dev. 2019;128:15–20. doi: 10.1016/j.earlhumdev.2018.11.002. - DOI - PubMed

LinkOut - more resources