Arithmetic mean differences in asthma severity outcomes (end of trial minus baseline)
| Outcome | N | Difference (95% CI) | p Value |
|---|---|---|---|
| QoL, quality of life. | |||
| Square root QoL score | |||
| Placebo | 98 | −0.17 (−0.27 to −0.06) | 0.0025 |
| Selenium | 99 | −0.22 (−0.31 to −0.13) | 4.0×10−6 |
| Selenium-placebo difference | 197 | −0.05 (−0.19 to 0.09) | 0.47 |
| Mean night-time asthma symptom score | |||
| Placebo | 98 | −0.18 (−0.36 to 0.01) | 0.057 |
| Selenium | 99 | −0.14 (−0.30 to 0.01) | 0.067 |
| Selenium-placebo difference | 197 | 0.04 (−0.21 to 0.28) | 0.77 |
| Mean daytime asthma symptom score | |||
| Placebo | 98 | −0.15 (−0.34 to 0.04) | 0.13 |
| Selenium | 99 | −0.12 (−0.29 to 0.05) | 0.17 |
| Selenium-placebo difference | 197 | 0.03 (−0.23 to 0.29) | 0.83 |
| Mean bronchodilator dosage (puffs/day) | |||
| Placebo | 98 | −0.60 (−1.23 to 0.02) | 0.058 |
| Selenium | 99 | −0.92 (−1.67 to −0.17) | 0.017 |
| Selenium-placebo difference | 197 | −0.32 (−1.29 to 0.66) | 0.52 |