Table 2

Comparison of cases and controls in terms of indoor/outdoor environmental factors

Cases (n=18)Controls (n=121)p Value
House renovation in the previous year0.02
 No18 (100%)84 (69.4%)
 Yes0 (0%)34 (28.1%)
 Unknown0 (0%)3 (2.5%)
New furniture in the previous year<0.01
 No15 (83.3%)46 (38.0%)
 Yes3 (16.7%)74 (61.2%)
 Unknown0 (0%)1 (0.8%)
New wall in the previous year<0.01
 No16 (88.9%)49 (40.5%)
 Yes2 (11.1%)72 (59.5%)
Indoor mould in the previous year0.01
 No5 (27.8%)76 (62.8%)
 Yes13 (72.2%)45 (37.2%)
Carpet in the house0.24
 No17 (94.4%)93 (76.9%)
 Yes1 (5.6%)27 (22.3%)
 Unknown0 (0%)1 (0.8%)
Air cleanser0.04
 No14 (77.8%)78 (64.5%)
 Yes4 (22.2%)17 (14.0%)
 Unknown0 (0%)26 (21.5%)
Air conditioner0.09
 No8 (44.4%)30 (24.8%)
 Yes10 (55.6%)91 (75.2%)
Humidifier<0.01
 No1 (5.6%)54 (44.6%)
 Yes17 (94.4%)67 (55.4%)
Humidifier detergent<0.01
 No1 (5.6%)89 (73.6%)
 Yes17 (94.4%)32 (26.4%)
Insecticide0.03
 No5 (27.8%)72 (59.5%)
 Yes13 (72.2%)48 (39.7%)
 Unknown0 (0%)1 (0.8%)
Dust<0.01
 No17 (94.4%)49 (40.5%)
 Yes1 (5.6%)71 (58.7%)
 Unknown0 (0%)1 (0.8%)
Pollen0.04
 No16 (88.9%)71 (58.7%)
 Yes2 (11.1%)48 (39.7%)
 Unknown0 (0%)2 (1.7%)