Table 3 Incidence of TBI across birth order categories according to the period of hospital stay (2 days or less vs more than 2 days), 1987–2005

1987–1992

Birth order

I

SE

LCI

UCI

I

SE

LCI

UCI

I

SE

LCI

UCI

1

54.56

6.52

41.78

67.34

9.53

2.75

4.14

14.93

63.74

7.03

49.95

77.54

2

79.03

8.24

62.88

95.18

10.52

3.03

4.56

16.47

89.15

8.74

72.01

106.28

3

73.35

11.74

50.33

96.37

15.37

5.43

4.72

26.02

88.16

12.86

62.96

113.37

4+

93.40

19.06

56.03

130.77

27.89

10.54

7.22

48.55

120.20

21.58

77.89

162.52

1993–1998

Birth order

I

SE

LCI

UCI

I

SE

LCI

UCI

I

SE

LCI

UCI

1

52.39

4.42

43.71

61.07

12.21

2.15

7.98

16.44

64.20

4.89

54.61

73.80

2

60.58

4.99

50.79

70.38

8.84

1.92

5.05

12.62

69.12

5.33

58.66

79.57

3

56.82

7.15

42.78

70.85

12.90

3.44

6.14

19.66

69.26

7.89

53.79

84.74

4+

70.84

11.49

48.31

93.36

17.19

5.73

5.96

28.42

87.29

12.73

62.34

112.25

1999–2005

Birth order

I

SE

LCI

UCI

I

SE

LCI

UCI

I

SE

LCI

UCI

1

78.06

4.27

69.69

86.44

5.95

1.19

3.61

8.28

83.68

4.41

75.02

92.33

2

70.99

4.27

62.61

79.36

4.72

1.11

2.54

6.90

75.45

4.40

66.82

84.07

3

82.72

6.82

69.35

96.10

4.01

1.51

1.04

6.99

86.41

6.96

72.76

100.06

4+

87.24

10.07

67.50

106.99

4.76

2.38

0.09

9.42

91.52

10.29

71.34

111.71

1987–2005

Birth order

I

SE

LCI

UCI

I

SE

LCI

UCI

I

SE

LCI

UCI

1

127.85

5.48

117.11

138.60

16.44

1.97

12.56

20.32

143.84

5.80

132.45

155.23

2

133.43

5.87

121.91

144.96

13.39

1.87

9.72

17.07

146.46

6.15

134.40

158.53

3

141.07

8.94

123.55

158.60

16.67

3.09

10.60

22.74

157.29

9.43

138.80

175.78

4+

160.73

13.73

133.81

187.64

23.86

5.33

13.40

34.31

183.85

14.67

155.09

212.61