Table I.
Characteristics of the study population
| Normal-weight cohorts | Severely obese cohorts | |||
|---|---|---|---|---|
| Characteristics | PPCC-NW | EPI-NW | PPCC-OB | YCC-OB |
| No. | 647 | 136 | 365 | 115 |
| Male sex, n (%) | 325 (50) | 72 (53) | 194 (53) | 49 (43) |
| Race (%) | ||||
| White | 79 (12)a | 104 (76)b | 74 (20)c | 69 (60)d |
| African-American | 512 (79) | 32 (24) | 235 (62) | 27 (23) |
| Other | 56 (9) | 0 (0) | 56 (15) | 19 (17) |
| Ethnicity, n (%) | ||||
| Non-Hispanic | 628 (97)a | 0 (0) | 347 (95)a | 96 (83)b |
| Hispanic | 16(2) | 0 (0) | 17 (5) | 19 (17) |
| Unknown | 3 (<1) | 136 (100) | 1 (<1) | 0 (0) |
| Health insurance, n (%) | ||||
| Public/Medicaid | 559 (86)a | 16 (12)b | 315 (86)a | 0 (0) |
| Private | 52 (8) | 90 (66) | 24 (7) | 0 (0) |
| Other/none | 3 (<1) | 2 (1) | 1 (<1) | 0 (0) |
| Unknown | 34 (5) | 28 (21) | 25 (7) | 115 (100) |
| Birth weight, kg, median (IQR) | 2.91 (2.41–3.35)a; n = 178 | 3.21 (2.95–3.52)b; n = 134 | 3.21 (2.81–3.66)b; n = 161 | 3.48 (2.92–3.77)c; n = 96 |
| Age at obesity onset, yr, median (IQR) | NA | NA | 2.00 (1.24–3.11)a | 1.39 (0.61–3.02)b |
NA, not applicable.
Columns with differing superscripted letters differ significantly from one another (P < .05). Superscripts for categorical variables reflect pairwise chi-square tests across all categories, excluding unknown values. Superscripts for continuous variables represent pairwise Wilcoxon rank sum tests.