Table 3.
- | Feature Characteristics and Annotation Methods | LASSO Parameters | |||||
---|---|---|---|---|---|---|---|
Ion Acquisition Mode | Retention Time (min) | m/z | Annotation Method | Level of Confidence | Selection | β a | |
Girls (n = 128) | |||||||
5-methyl-tetrohydrofolate (THF) | + | 3.63 | 460.194 | In-house library | Level 1 | 96 | −0.508 |
Urate | + | 1.00 | 169.037 | In-house library | Level 1 | 96 | 0.576 |
Unknown | + | 9.54 | 920.466 | 95 | −0.467 | ||
Phenylephrine | + | 0.94 | 168.102 | In-house library | Level 1 | 95 | 0.419 |
Unknown | + | 29.63 | 647.560 | 94 | −0.346 | ||
Unknown | − | 0.79 | 195.810 | 93 | 0.399 | ||
Unknown | + | 24.97 | 810.597 | 90 | −0.348 | ||
Unknown | + | 10.11 | 211.131 | 83 | 0.249 | ||
Unknown | + | 22.22 | 435.271 | 81 | −0.288 | ||
Nonanoate | − | 18.33 | 157.123 | In-house library | Level 1 | 81 | 0.287 |
Unknown | − | 18.57 | 473.275 | 80 | 0.335 | ||
Unknown | − | 8.47 | 516.006 | 78 | −0.247 | ||
Unknown | + | 22.91 | 359.317 | 77 | −0.238 | ||
Unknown | + | 19.33 | 501.317 | 76 | −0.241 | ||
Unknown | − | 16.19 | 398.036 | 75 | 0.265 | ||
Deoxyuridine | + | 1.67 | 251.066 | In-house library | Level 1 | 75 | 0.257 |
Unknown | + | 19.80 | 588.318 | 73 | −0.269 | ||
Unknown | − | 20.63 | 584.236 | 73 | 0.198 | ||
Unknown | + | 25.07 | 1614.146 | 72 | −0.216 | ||
Sn-glycero-3-phosphocholine | + | 0.61 | 258.111 | In-house library | 71 | 0.192 | |
Boys (n = 114) | |||||||
2-piperidinone | + | 2.68 | 100.077 | In-house library | Level 1 | 96 | 0.45 |
Unknown | − | 12.73 | 430.015 | 91 | 0.36 | ||
Unknown | + | 18.77 | 455.202 | 91 | 0.45 | ||
Unknown | + | 7.82 | 279.171 | 90 | 0.51 | ||
Octanoylcarnitine | + | 25.31 | 752.562 | In-house library | Level 1 | 86 | −0.42 |
Unknown | + | 11.65 | 311.147 | 86 | −0.38 | ||
Catechol | − | 2.50 | 109.029 | In-house library | Level 1 | 82 | 0.35 |
Unknown | − | 24.00 | 883.537 | 81 | 0.30 | ||
Unknown | + | 14.05 | 793.411 | 77 | −0.28 | ||
Unknown | + | 22.91 | 471.353 | 75 | 0.24 | ||
Unknown | + | 12.03 | 1238.497 | 75 | −0.37 |
a Estimates are adjusted for age and pubertal status (breast and pubic hair for girls; testicular volume and pubic hair for boys).