Analytical methods | |||
---|---|---|---|
Comparative study | #1 | #2 | |
Chromatography | GC | – | |
Ion source | – | – | |
Positive/Negative mode | – | – | |
Mass analyzer | TOF | NMR | |
Identification level | – | – |
Sample information | |||
---|---|---|---|
Comparative study | #1 | #2 | |
Country | Canada | Canada | |
Specimen | serum | serum | |
Marker function | diagnosis | diagnosis | |
Participants(Case) | Cancer type | lung cancer | lung cancer |
Stage | I, II, III, IV | I, II, III, IV | |
Number | 25 | 25 | |
Gender (M,F) | 15, 10 | 15, 10 | |
Mean age (range) (M,F) | 64 (42-77) | 64 (42-77) | |
Smoking status | smoker, non-smoker | smoker, non-smoker | |
Participants(Control) | Type | before vs. after treatment (radiation treatment) | before vs. after treatment (radiation treatment) |
Number | – | – | |
Gender (M,F) | – | – | |
Mean age (range) (M,F) | – | – | |
Smoking status | smoker, non-smoker | smoker, non-smoker |
Data processing and metabolite identification | |
---|---|
Data processing software | Chenomx NMR Suite 7.1, Metabolite Detector |
Database search | – |
Statistical analysis | |
---|---|
Differential analysis method | OPLS-DA, CV-ANOVA |
Classification method | – |
Survival analysis method | – |
Metabolite | Author-emphasized biomarkers | Mean concentration (case) | Mean concentration (control) | Fold change (case/control) | P-value | FDR | VIP |
---|---|---|---|---|---|---|---|
2-aminobutyrate | – | – | – | – | – | – | >1 |
2-oxoglutarate | – | – | – | – | – | – | >1 |
4-hydroxybutyrate | – | – | – | – | – | – | >1 |
butanoic acid, 2-hydroxy | V | – | – | – | – | – | >1 |
citrate | – | – | – | – | – | – | >1 |
citric acid | V | – | – | – | – | – | >1 |
creatinine | – | – | – | – | – | – | >1 |
dimethylamine | – | – | – | – | – | – | >1 |
erythritol | – | – | – | – | – | – | >1 |
glucopyranose | V | – | – | – | – | – | >1 |
isopropanol | – | – | – | – | – | – | >1 |
methionine | – | – | – | – | – | – | >1 |
ribitol | – | – | – | – | – | – | >1 |
threonine | – | – | – | – | – | – | >1 |
Metabolite | Author-emphasized biomarkers | Cutoff value | AUROC (95%CI) | Sensitivity (%) | Specificity (%) | Accuracy (%) |
---|---|---|---|---|---|---|
2-aminobutyrate | – | – | – | – | – | – |
2-oxoglutarate | – | – | – | – | – | – |
4-hydroxybutyrate | – | – | – | – | – | – |
butanoic acid, 2-hydroxy | V | – | – | – | – | – |
citrate | – | – | – | – | – | – |
citric acid | V | – | – | – | – | – |
creatinine | – | – | – | – | – | – |
dimethylamine | – | – | – | – | – | – |
erythritol | – | – | – | – | – | – |
glucopyranose | V | – | – | – | – | – |
isopropanol | – | – | – | – | – | – |
methionine | – | – | – | – | – | – |
ribitol | – | – | – | – | – | – |
threonine | – | – | – | – | – | – |