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Table 2 Percent increases for 10 ppb increase in ozone by season, month, and age groups.

From: Is there adaptation in the ozone mortality relationship: A multi-city case-crossover analysis

  % 95% C.I.
by season    
Winter -0.13 -0.56 0.29
Spring 0.35 0.16 0.54
Summer 0.50 0.38 0.62
Autumn 0.05 -0.14 0.24
by month    
May 0.48 0.28 0.68
June 0.46 0.24 0.68
July 0.65 0.47 0.82
August 0.28 0.11 0.46
September -0.09 -0.35 0.16
by age group    
0–20 0.08 -0.42 0.57
21–30 0.10 -0.67 0.87
31–40 0.07 -0.38 0.52
41–50 0.08 -0.27 0.43
51–60 0.54 0.19 0.89
61–70 0.38 0.16 0.61
71–80 0.50 0.32 0.67
> 80 0.29 0.13 0.44