OASIS

Question 1

Proportion of women who sustain a tear at vaginal delivery

Answer 1

90%

Question 2

Incidence of OASI in primips

Answer 2

6 in 100

Question 3

Overall incidence of OASI

Answer 3

2.9%

Question 4

Incidence of OASI in multips

Answer 4

2 in 100

Question 5

Proportion of women who had previous OASI who have c-section second birth?

Answer 5

1 in 4

Question 6

Rate of OASI in second birth with previous OASI

Answer 6

1.3 in 100

Question 7

Incidence of OASI with forceps and episiotomy

Answer 7

6 in 100