Table 1.
Subject characteristics
| Characteristic | Value |
|---|---|
| Age at surgery (yr) | |
| Mean ± SD | 17.3 ± 1.99 |
| Range | 13–23 |
| Age group (yr) | |
| 13–15 | 26.7% (19) |
| 16–17 | 42.3% (30) |
| ≥18 | 31.0% (22) |
| Gender | |
| Male | 31.0% (22) |
| Female | 69.0% (49) |
| Race | |
| White | 87.3% (62) |
| Black | 12.7% (9) |
| Distance from clinic (miles) | |
| Mean ± SD | 157.9 ± 181.36 |
| Range | 2–913 |
| Distance group (miles) | |
| <50 | 35.2% (25) |
| 50–99 | 15.5% (11) |
| 100–199 | 21.1% (15) |
| ≥200 | 28.2% (20) |
| Baseline BMI (kg/m2) | |
| Mean ± SD | 59.2 ± 11.46 |
| Range | 41–95 |
| BMI group (kg/m2) | |
| <50 | 18.3% (13) |
| 50–59 | 42.3% (30) |
| ≥60 | 39.4% (28) |
| Insurance | |
| Private | 58.6% (41) |
| Public | 41.4% (29) |
| Year of surgery | |
| 2001–2002 | 9.9% (7) |
| 2003 | 25.4% (18) |
| 2004 | 29.6% (21) |
| 2005 | 21.1% (15) |
| 2006–2007 | 14.0% (10) |
SD = standard deviation; BMI = body mass index.
Data in parentheses are numbers.