Table 1. Rat mammary tissue samples used in this study.
| Rat Study | Type | Rats Planned* | Samples planned* | Rats used* | Samples used* |
|---|---|---|---|---|---|
| Experiment | Injected with NMU | ||||
| Tumor sites | 5 | 10 | 1 | 1 | |
| Surrounding tissue 1 cm away from center of visible tumor | 5 | 17 | 5 | 17 | |
| Mammary tissue more than 3 cm away from the center of visible tumor | 5 | 13 | 5 | 13 | |
| Control | Injected with PBS | ||||
| Healthy mammary tissue | 5 | 37 | 5 | 35 | |
| Total | 77 | 66 | |||
*“Rats/Samples planned” refers to tissue samples from which the data have been collected. “Rats/Samples used” refers to the tissue samples that were found to have more than 10 fatty acid-dominated spectra (>10) through the matching algorithm and therefore contributed to the statistical analysis (see Methods).