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Table 4 Geographical variation in the definition of OASI

From: Management of obstetric anal sphincter injury: a systematic review & national practice survey

Health Region

EAS part torn = 2° – Yes

EAS completely torn = 2° – Yes

EAS complete or partially torn= 2° – Yes

Scotland

29/65 (44.6)

12/65 (18.4)

41/65 (63)

Northern

11/29 (37.9)

09/29 (31)

20/29 (68.9)

Northern Ireland

18/35 (51.4)

06/35 (17.1)

24/35 (68.5)

Republic of Ireland

06/22 (27.2)

02/22 (9.1)

08/22 (36.3)

York

08/43 (18.6)

03/43 (6.9)

11/43 (25.5)

North Western

01/07 (14.2)

02/07 (28.5)

03/07 (42.8)

Mersey

14/54 (26)

08/54 (14.8)

22/54 (40.7)

Trent

18/47 (38.2)

10/47 (21.2)

28/47 (59.5)

West midlands

22/63 (34.9)

07/63 (11.1)

29/63 (46)

Wales

12/36 (33.3)

04/36 (11.1)

16/36 (44.4)

Anglia

12/32 (37.5)

04/32 (12.5)

16/32 (50)

Oxford

06/19 (31.5)

02/19 (10.5)

08/19 (42)

North East Thames

13/43 (30.2)

04/43 (9.3)

17/43 (39.5)

North West Thames

05/28 (17.8)

01/28 (33.6)

06/28 (21.4)

South East Thames

13/45 (28.8)

04/45 (8.8)

17/45 (37.8)

South West Thames

11/32 (34.3)

02/32 (6.3)

13/32 (40.6)

Wessex

08/29 (27.5)

01/29 (3.4)

09/29 (30.9)

South west

13/43 (30.2)

04/43 (9.3)

17/43 (39.5)

Total

220/672 (32.7)

85/672 (12.6)

305/672 (45.3)