Table 4.
Summary of regression predictor parameters from 158 homes in Iowa
| Characteristic | N (%) | Mean (SD), Median |
|---|---|---|
| Basement foundation wall material | - | |
| Concrete block | 82 (51.9) | |
| Poured concrete | 45 (28.5) | |
| Neither concrete block nor poured concrete | 31 (19.6) | |
| Case/control status of participants | - | |
| Case | 48 (30.4) | |
| Control | 110 (69.6) | |
| Number of major plumbing penetrations in basement | 123 (77.8) | 2.0 (0.9), 2.0 |
| Missing | 35 (22.2) | |
| Percentage of basement underground | 150 (94.9) | 82 (18), 90 |
| Missing | 8 (5.1) | |
| Presence of central air conditioning | - | |
| Yes | 112 (70.9) | |
| No | 46 (29.1) | |
| Presence of clothes dryer in basement | - | |
| Yes | 96 (60.8) | |
| No | 62 (39.2) | |
| Presence of crawl space in basement | - | |
| Yes | 72 (45.6) | |
| No | 86 (54.4) | |
| Presence of forced air heating system | - | |
| Yes | 130 (82.3) | |
| No | 28 (17.7) | |
| Presence of sump in basement | - | |
| Yes | 33 (20.9) | |
| No | 122 (77.2 ) | |
| Missing | 3 ( 1.9) | |
| Volume of basement | 158 (100) | 5779 (2826), 5618 |