Table 2. Descriptive odds ratio across all relative age quarters. 
 Total 

Quarter 
x^{2} 
p 
OR [95% CI] 
Q1:Q2 
8.377 
.004 
2.73 [1.68, 4.45] 
Q1:Q3 
12.832 
<.001 
3.65 [2.19, 6.08] 
Q1:Q4 
17.672 
<.001 
4.86 [2.85, 8.30] 

Note: bolded values indicate significance of odds ratio (if 95% CI does not include 1). OR=odds ratio; CI = confidence interval 
