Table 1.
Characteristics of the included studies
| Trial | Use of a HEPA filter | Subjects | Primary allergy | Health outcomes extracted |
|---|---|---|---|---|
| Zwemer [22], 1973 | Nocturnal laminar airflow | Child | House dust mite | ASS |
| Verrall [23], 1988 | Nocturnal laminar airflow | Adult | House dust mite | Medication use |
| Antonicelli [23], 1991 | Mobile device | Adult | House dust mite | ASS, medication use, FEV1 %pred, PC20 |
| Warburton [24], 1994 | Mobile device | Adult | House dust mite | FEV1 %pred |
| Van der Heide [26], 1997 | Mobile device | Adult | House dust mite | PC20 |
| Wood [28], 1998 | Mobile device | Adult | Cat | ASS, medication use |
| Van der Heide [27], 1999 | Mobile device | Child | Cat or dog | Medication use, PC20 |
| Pedroletti [13], 2009 | Nocturnal laminar airflow | Adult | Cat or dog | AQLQ score, FeNO level |
| Sulser [30], 2009 | Mobile device | Adult | Cat or dog | PC20 |
| Boyle [31], 2012 | Nocturnal laminar airflow | Adult | House dust mite or cat | Medication use, FEV1 %pred, AQLQ score, FeNO level |