Table 1 Emergency Laparotomy recruitment overall and by hospital (n = 11)

N1 Number of admissions discharged alive

18

46

81

39

21

54

64

110

18

56

39

546

N2 Number of eligible patients

13

36

67

36

18

44

55

95

15

49

38

466

N3 Number invited to take part

12

31

62

27

15

40

49

80

9

42

28

395

N4 Number participated

11

20

42

20

11

21

30

50

8

33

22

268

N2/N1 Percentage of admissions deemed eligible

72

78

82

92

86

82

86

86

83

88

97

85

N3/N2 Percentage of eligible patients invited

92

86

93

75

83

91

89

84

60

86

74

85

N4/N2 Percentage of eligible patients participating.

85

56

63

56

61

47

55

53

48

67

59

59

N4/N3 Percentage of invited patients participating.

92

65

68

74

73

55

61

63

77

79

85

72

N4/N1 Percentage of admissions participating

61

43

52

51

52

39

47

45

44

59

56

49