Table 2 Age-specific BMI classification among children from the National Health Insurance Service database (2008–2020).
From: Early life factors of precocious puberty based on Korean nationwide data
Variables, mean (SD) | Boys | Girls | |||||
|---|---|---|---|---|---|---|---|
Control group | CPP group | P-value | Control group | CPP group | P-value | ||
3rd 18–24 months | Underweight | 8693 (3.10) | 49 (2.32) | 0.0438 | 7156 (2.13) | 606 (1.86) | 0.0002 |
Normal weight | 206,588 (73.65) | 1532 (72.47) | 263,388 (78.28) | 25,380 (77.80) | |||
Overweight | 40,287 (14.36) | 326 (15.42) | 41,318 (12.28) | 4162 (12.76) | |||
Obese | 24,924 (8.89) | 207 (9.79) | 24,587 (7.31) | 2474 (7.58) | |||
4th 30–36 months | Underweight | 9808 (3.53) | 60 (2.91) | 0.0003 | 13,903 (4.11) | 1114 (3.42) | < 0.0001 |
Normal weight | 202,170 (72.81) | 1436 (69.57) | 246,767 (73.00) | 23,484 (72.02) | |||
Overweight | 31,028 (11.17) | 278 (13.47) | 36,630 (10.84) | 3855 (11.82) | |||
Obese | 34,672 (12.49) | 290 (14.05) | 40,728 (12.05) | 4155 (12.74) | |||
5th 42–48 months | Underweight | 8696 (3.30) | 43 (2.16) | < 0.0001 | 10,802 (3.38) | 787 (2.53) | < 0.0001 |
Normal weight | 211,021 (79.98) | 1527 (76.85) | 251,702 (78.72) | 23,975 (77.16) | |||
Overweight | 23,898 (9.06) | 220 (11.07) | 33,553 (10.49) | 3725 (11.99) | |||
Obese | 20,224 (7.67) | 197 (9.91) | 23,701 (7.41) | 2584 (8.32) | |||
6th 54–60 months | Underweight | 11,112 (4.54) | 62 (3.33) | < 0.0001 | 10,936 (3.72) | 760 (2.66) | < 0.0001 |
Normal weight | 197,904 (80.79) | 1430 (76.80) | 237,868 (80.85) | 22,639 (79.27) | |||
Overweight | 19,250 (7.86) | 193 (10.37) | 26,843 (9.12) | 3056 (10.70) | |||
Obese | 16,682 (6.81) | 177 (9.51) | 18,565 (6.31) | 21,04 (7.37) | |||
7th 66–71 months | Underweight | 10,103 (4.59) | 36 (2.23) | < 0.0001 | 13,392 (5.08) | 773 (3.04) | < 0.0001 |
Normal weight | 172,153 (78.20) | 1190 (73.78) | 208,860 (79.19) | 19,680 (77.51) | |||
Overweight | 18,290 (8.31) | 168 (10.42) | 21,740 (8.24) | 2718 (10.70) | |||
Obese | 19,605 (8.9) | 219 (13.58) | 19,749 (7.49) | 2220 (8.74) | |||
