Table 1. Comparison of characteristics of the study population between boys and girls in NHANES 2001–2018.
| N | Overall | Males | Females | P | |
|---|---|---|---|---|---|
| Sample size (%) | 11219 | 11219 | 5767(51.4%) | 5452 | |
| SUA (mg/dl) | 11219 | 5.00±1.24 | 5.58±1.21 | 4.38±0.94 | <0.001 |
| Age (y) | 11219 | 15.00±1.99 | 15.02±1.98 | 14.97±1.99 | 0.25 |
| Race, N (%) | 0.112 | ||||
| Mexican American | 3044 | 3,044 (27.13) | 1508 (26.15) | 1,536 (28.17) | |
| Other Hispanic | 850 | 850 (7.58) | 425 (7.37) | 425 (7.80) | |
| Non-Hispanic White | 3151 | 3151 (28.09) | 1649 (28.59) | 1502 (27.55) | |
| Non-Hispanic Black | 3146 | 3146 (28.04) | 1645 (28.52) | 1501 (27.53) | |
| Other race/multi-racial | 1028 | 1028 (9.16) | 540 (9.36) | 488 (8.95) | |
| PIR, N (%) | 0.069 | ||||
| <1 | 3109 | 3109 (27.71) | 1555 (26.96) | 1554 (28.50) | |
| > = 1 | 8110 | 8110 (71.5) | 4212 (73.04) | 3898 (71.50) | |
| TV time (h/d), N (%) | 0.057 | ||||
| <1h | 1232 | 1232 (15.28) | 589 (14.39) | 643 (16.19) | |
| 1-3h | 4917 | 4917 (60.97) | 2537 (61.98) | 2380 (59.93) | |
| > = 4h | 1915 | 1915 (23.75) | 967 (23.63) | 948 (23.87) | |
| Computer time (h/d), N (%) | <0.001 | ||||
| <1h | 3366 | 3366 (41.72) | 1622 (39.59) | 1744 (43.92) | |
| 1-3h | 3598 | 3598 (44.60) | 1881(45.91) | 1717 (43.24) | |
| > = 4h | 1104 | 1104 (13.68) | 594 (14.50) | 510 (12.84) | |
| BMI (kg/m2) | 11103 | 23.90±6.05 | 23.61±5.93 | 24.20±6.16 | <0.001 |
| BMIZ | 11103 | 0.89±1.39 | 0.87±1.42 | 0.91±1.35 | 0.08 |
| WC (cm) | 10956 | 81.48±14.94 | 81.61±15.57 | 81.35±14.25 | 0.36 |
| WHtR | 10954 | 0.49±0.09 | 0.48±0.09 | 0.51±0.09 | <0.001 |
| HDL-C(mg/dl) | 7553 | 52.28±12.46 | 50.53±12.30 | 54.14±12.36 | <0.001 |
| LDL-C (mg/dl) | 4814 | 88.69±25.87 | 87.90±26.94 | 89.56±24.61 | 0.026 |
| TC (mg/dl) | 11211 | 158.21±29.57 | 156.18±30.02 | 160.36±28.93 | <0.001 |
| TG (mg/dl) | 4911 | 82.15±58.67 | 84.32±67.64 | 79.76±46.77 | 0.007 |
| nonHDL-C(mg/dl) | 7553 | 104.26±28.88 | 103.62±29.80 | 104.93±27.86 | 0.049 |
| Glu (mg/dl) | 4960 | 93.91±17.47 | 95.80±19.13 | 91.82±15.17 | <0.001 |
| Insulin (uU/mL) | 4909 | 14.44±12.66 | 13.72±12.41 | 15.23±12.88 | <0.001 |
| SPISE | 3122 | 8.49±2.95 | 8.66±3.10 | 8.30±2.76 | <0.001 |
| SBP (mmHg) | 9373 | 109.16±9.87 | 111.67±10.21 | 106.54±8.78 | <0.001 |
| DBP (mmHg) | 9373 | 59.41±11.80 | 58.34±12.79 | 60.51±10.57 | <0.001 |
| eGFR (mL/min/1.73 m2) | 9220 | 147.87±32.24 | 157.94±34.54 | 136.98±25.41 | <0.001 |
SUA: serum uric acid; PIR: the poverty: income ratio; TV time: the average hours of watching TV per day over the past 30 days; Computer time: the average hours of a computer over the past 30 days; BMI: body mass index; BMIZ: body mass index Z score; WC: waist circumference; WHtR: waist to height ratio; HDL-C: high density lipoprotein cholesterol; LDL-C: low density lipoprotein cholesterol; TC: total cholesterol; TG: triglycerides; nonHDL-C: Non-HDL cholesterol; FPG: fasting plasma glucose; SPISE: Single Point Insulin Sensitivity Estimator; SBP: mean systolic blood pressures; DBP: mean diastolic blood pressures; eGFR: estimated glomerular filtration rate.
Data are expressed as the mean ± standard deviation (SD) or N and percent (%).
P-values are calculated by Student’s t-test for continuous variables and Chi-square test for categorical variables.