Table 2.

SIRs for familial history of NHL by histopathologic type



Any first-degree relative

Parents only

Siblings only
Histopathologic type in offspring
O
SIR (95% CI)
O
SIR (95% CI)
O
SIR (95% CI)
NHL  115   1.8 (1.5-2.2)*  89   1.8 (1.4-2.2)*  26   1.9 (1.1-3.2)* 
Diffuse large B-cell   15   1.8 (1.0-3.0)   15   2.3 (1.2-3.8)*  0   —  
Follicular   29   2.0 (1.4-2.9)*  22   2.0 (0.9-3.0)   7   2.3 (1.1-4.8)* 
B-cell, NOS   19   1.8 (1.1-2.8)*  11   1.3 (0.7-2.4)   8   3.4 (1.5-6.8)* 
T-cell   5   1.0 (0.3-2.3)   4   1.0 (0.3-2.6)   1   1.0 (0-5.5)  
NHL, NOS   22   1.7 (1.1-2.6)*  18   1.8 (1.1-2.8)*  4   1.4 (0.4-3.6)  
Other   25   2.1 (1.4-3.1)*  19   2.1 (1.2-3.2)*  6   2.4 (0.8-5.3)  
Multiple myeloma  13   0.7 (0.4-1.2)   8   0.5 (0.2-1.1)   4   0.9 (0.2-2.4)  
Plasma cell   12   0.7 (0.3-1.2)   7   0.5 (0.2-1.0)   4   1.0 (0.3-2.5)  
Plasmacytoma, NOS   1   0.8 (0-4.8)   1   1.1 (0-6.1)   0   —  
CLL
 
25
 
1.7 (1.1-2.5)*
 
20
 
1.7 (1.0-2.7)
 
5
 
1.5 (0.5-3.5)
 


Any first-degree relative

Parents only

Siblings only
Histopathologic type in offspring
O
SIR (95% CI)
O
SIR (95% CI)
O
SIR (95% CI)
NHL  115   1.8 (1.5-2.2)*  89   1.8 (1.4-2.2)*  26   1.9 (1.1-3.2)* 
Diffuse large B-cell   15   1.8 (1.0-3.0)   15   2.3 (1.2-3.8)*  0   —  
Follicular   29   2.0 (1.4-2.9)*  22   2.0 (0.9-3.0)   7   2.3 (1.1-4.8)* 
B-cell, NOS   19   1.8 (1.1-2.8)*  11   1.3 (0.7-2.4)   8   3.4 (1.5-6.8)* 
T-cell   5   1.0 (0.3-2.3)   4   1.0 (0.3-2.6)   1   1.0 (0-5.5)  
NHL, NOS   22   1.7 (1.1-2.6)*  18   1.8 (1.1-2.8)*  4   1.4 (0.4-3.6)  
Other   25   2.1 (1.4-3.1)*  19   2.1 (1.2-3.2)*  6   2.4 (0.8-5.3)  
Multiple myeloma  13   0.7 (0.4-1.2)   8   0.5 (0.2-1.1)   4   0.9 (0.2-2.4)  
Plasma cell   12   0.7 (0.3-1.2)   7   0.5 (0.2-1.0)   4   1.0 (0.3-2.5)  
Plasmacytoma, NOS   1   0.8 (0-4.8)   1   1.1 (0-6.1)   0   —  
CLL
 
25
 
1.7 (1.1-2.5)*
 
20
 
1.7 (1.0-2.7)
 
5
 
1.5 (0.5-3.5)
 

First-degree relatives are parents, siblings, and offspring.

O indicates number of observed cases; CLL indicates chronic lymphocytic leukemia; and—, not determined.

*

95% CI does not include 1.00.

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