Study and control population characteristicsa
| Mean Age (Range) | Sex | Field Strength | Scan Type | ||||
|---|---|---|---|---|---|---|---|
| Male | Female | 1.5T | 3T | Planar | Volumetric | ||
| Neoplasm | 9.1 yr (1 day to 35 yr) | 306 | 274 | 504 | 76 | 470 | 110 |
| Controls | 10.2 yr (1 day to 31 yr) | 274 | 306 | 486 | 94 | 473 | 107 |
↵a The neoplasm group was slightly younger than the control group (P = .001 by 2-tailed t test). No significant differences were identified in sex (P = .07), field strength (P = .16), or scan type (P = .89) between the 2 groups.