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Table 4 2 × 2 table for example 2

From: Calculating confidence intervals for impact numbers

  

Status of stroke

 
  

yes

no

∑

Exposure

current smoker

420

10099

10519

 

never-smoker

153

4665

4818

 

∑

573

14764

15337

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BMC Medical Research Methodology

ISSN: 1471-2288

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