Skip to main content

Advertisement

Table 3 Multivariate model of variables remaining independently significant as risk factors for OASIS

From: Can the risk of obstetric anal sphincter injuries (OASIs) be predicted using a risk-scoring system?

p-value 95% CI OR Subgroup Variable
< 0. 001 1.61-3.75 2.45 Yes Shoulder dystocia
     Mode of delivery
< 0. 001 2.25-4.35 3.13 Forceps  
0.001 1.18-1.99 1.54 Ventouse
     Epidural
0.014 0.56-0.94 0.73 Yes (Baseline = no)
     Place of delivery
0.039 0.13-0.95 0.35 Home
     Other analgesia
< 0. 001 2.78-6.49 4.24 Spinal
     Smoking status
0.008 0.38-0.87 0.58 Smoker
0.002 1.22-2.32 1.68 Yes Water immersion
< 0. 001 0.30-0.41 0.35   Multiparity
< 0. 001 1.03-1.06 1.04   Mothers age in years
     Ethnicity
< 0. 001 2.30-3.66 2.90 South Asian
0.049 1.01-3.63 1.91 East Asian
0.006 1.10-1.73 1.38 Other
< 0. 001 1.000634-1.001007 1.000821   Birth weight in g