Table 4 Odds and odds ratios for additional bronchodilator use and waking at night with asthma symptoms at end of trial.

Outcome	N	Odds/OR (95% CI)	p Value
Additional bronchodilator usage
Placebo	98	0.37 (0.22 to 0.62)	0.00017
Selenium	99	0.22 (0.13 to 0.39)	1.6×10−7
Selenium/placebo ratio	197	0.61 (0.28 to 1.30)	0.2
Woken at night with asthma symptoms
Placebo	98	0.39 (0.23 to 0.64)	0.00021
Selenium	99	0.33 (0.20 to 0.55)	0.000013
Selenium/placebo ratio	197	0.86 (0.42 to 1.74)	0.67