Association between severities of striae gravidarum and Obstetric Anal Sphincter Injuries (OASIS)

Abstract

Objectivesto examine the association between the severities of Striae Gravidarum (SG) and Obstetric Anal Sphincter Injuries (OASIS) and to measure the symptoms regarding urinary incontinence, fecal/flatus incontinence, and dyspareunia, at 6 and 12 months postpartum. Designthis is a cohort study. Settingfour university teaching medical centers in Israel, two in the north and two in the center of the country. Participantswomen with OASIS were interviewed and assessed for SG. OASIS was divided into 4 groups: 3A, 3B, 3C and 4. Inclusion criteria were:OASIS diagnosis, non-instrumental vaginal childbirth, birth between 37 and 42 gestational weeks, singleton newborn, neonatal birth weight of Severity scoring of SG severity scoring, using Atwal’s Numerical Scoring System,observed 4 body sites; Abdomen, Breasts, Hips, and Buttocks., Total severity score (TSS) for all sites range between 0 and 24 and categorized: 0–3: no SG (NSG) and 4 and over: SG.The Pelvic Floor Symptom Bother Questionnaire (PFBQ),a validated, structured questionnaire, was used for the 6 and 12 month follow-up assessments, with nine items regarding pelvic floor dysfunction (urinary and bowel impairment uterine prolapse and sexual function). Measurements and findingseighty women who had OASIS were enlisted, interviewed and assessed for SG. The average score for women with some SG was 6.10 (SD = 4.12). There were 58 (72.5%) women with OASIS level 3A; 12 (15%) had 3B; 4 (5.0%) had 3C and 6 (7.5%) had 4th degree anal injuries, respectively. Forty two (52.5%) of the women had SG and 38 (47.5%) had no SG. There was no association between SG severity and OASIS (3A, 3B, 3C+4th) χ2 (6) = 8.4014; p = 0.2. As there were only 10 women with OASIS of 3C and 4, we re-analyzed the association between SG severity and OASIS severity of 3A and 3B. There was a significant association between SG severity and OASIS severity (3A, 3B) χ2 (3) = 9.306; p = 0.025. Additional findingswomen with SG were younger (mean = 26.74, SD = 3.57) than women without SG (mean = 29.29, SD = 4.40) (t(78) = 2.86, p = .005). Three symptoms had a significant reduction in the bother degree between 6 and 12 months: urinary incontinence (p = 0.017), flatus incontinence (p = 0.031) and sexuality (p = 0.016). Key conclusionsthe innovation of this research is the association between SG severity and OASIS severity (3A, 3B), added information regarding OASIS risk factors.