Table 4 Body size indicatorsa and risk of breast cancer death among breast cancer patients aged 40 years or younger at diagnosis

From: Exercise activity, body size and premenopausal breast cancer survival

 

Censored

Events

HRb

95% Cl

BMI (kg m−2)

    

 <20.4

110

65

1.00

 

 20.4–21.9

117

64

0.79

0.56–1.12

 22.0–24.8

113

66

0.89

0.63–1.26

 24.9+

118

64

0.76

0.53–1.07

 Trend P

  

0.21

 

Weight (kg)

    

 <54.1

116

57

1.00

 

 54.1–60.9

115

81

1.10

0.78–1.54

 61.0–68.1

110

54

0.87

0.60–1.26

 68.2+

125

59

0.86

0.60–1.23

 Trend P

  

0.21

 

Weight gain (kg)

    

 0

73

33

1.00

 

 0.1–5.0

181

112

0.97

0.66–1.43

 5.1–10.0

104

49

0.81

0.52–1.24

 10+

108

57

0.93

0.61–1.42

 Trend P

  

0.53

 

Height (m)

    

 <1.60

100

57

1.00

 

 1.60–1.64

133

68

0.92

0.65–1.30

 1.65–1.68

124

59

0.84

0.58–1.21

 1.69+

109

67

1.17

0.81–1.69

 Trend P

  

0.52

 
  1. Body size indicators at reference date (1 year before diagnosis), except for weight gain which was increase in weight from age 18 years to the reference age.
  2. bModels include age, stage at diagnosis and physical activity (combination of average hours per week during the reproductive years and average hours per week during the year before the reference date); in addition, models of weight and height are mutually adjusted.
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