Incidence and risk factors of obstetric anal sphincter injury at a tertiary care hospital in Thailand: A 10-year retrospective cohort study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20240416004

Enrollment

10000

Registered

2024-04-16

Start date

2024-05-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

obstetric anal sphincter injury obstetric anal sphincter injury OASIS OASI Perineal laceration Perineal tear

Interventions

Pregnant women who have obstetric anal sphincter injury

Screening

Group OASI

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Pregnant women with gestational age of 24 weeks or more, or infants weighing 500 grams or more born through vaginal delivery at Srinagarind hospital between January 1, 2014, and December 31, 2023.

Exclusion criteria

Exclusion criteria: Women with a gestational age < 24 weeks and birthweight < 500 g or incomplete record were excluded.

Design outcomes

Primary

Measure	Time frame
Incidence of obstetric anal sphincter injury At day of delivery Incidence in percentage	—

Secondary

Measure	Time frame
Risk factors of obstetric anal sphincter injury At day of delivery Risk factors in percentage	—

Countries

Thailand

Contacts

Public ContactUsana Unpikool

Faculty of Medicine, Khonkean University

ion.usana@gmail.com043363030

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026