a significant trendp < 0.01
There was also a significant trend ( p < 0.01) in prevalence of lower respiratory symptoms that improved when away from the building: 52% of those with postoccupancy-onset asthma, 41% of those with adult preoccupancy-onset asthma, 27% of those with childhood asthma, and 23% of those with no physician-diagnosed asthma ( Table 4 ).