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Table 3 Familial risk for developing cancer (non-lung cancer and lung cancer)among lung cancer case families and control families

From: Increased risk of cancer among relatives of patients with lung cancer in China

 

Case

Control

 

Cancers (n.)

Families (no.)

Relativesa (no.)

Families (no.)

Relativesa (no.)

ORb (95%CI)

Non-lung cancer

     

0

657

3,591

720

3,865

 

1

96

568

63

397

1.54(1.17–2.28)**

2

34

194

12

79

1.67 (0.91–3.91)

3

11

83

4

28

2.11 (1.02–7.98)*

4+

2

17

1

9

3.13 (0.89–60.66)

Lung cancer

     

0

658

3629

706

3757

 

1

113

636

81

528

1.48 (1.11–2.02)*

2

17

103

11

77

2.96 (1.44–6.02)**

3

10

69

2

16

5.67 (1.24–34.89)*

4+

2

16

0

0

--

  1. * p < 0.05. ** p < 0.01.
  2. a Excludes probands and spouses. b Represents familial risk of case families, not individual risk, adjusted for family size, total smoky coal exposure, number of person smoking and commune of residence.