| Outcome | Number of studies | Significant improvement |
| Asthma symptoms | 12 | 3 (Kjellen 1981; Larrain 1991;Levin 1998) |
| Nocturnal asthma score | 6 | 3 (Goodall 1981; Ekstrom 1989; Kiljander 1999)) |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.