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MP particle/sand grain ratios in the emergency and portable cases given as mean ± standard error of the mean (SEM)
| Emergency cases | Portable cases | |||
|---|---|---|---|---|
| MP/sand ratio (mean ± SEM) | n | MP/sand ratio (mean ± SEM) | n | |
| PVC lc | 0.08 ± 0.02 | 8 | 0.03 | 1 |
| PET lc | 0.61 ± 0.11 | 5 | 0.82 ± 0.33 | 3 |
| PVC hc | 1.01 ± 0.41 | 3 | 3.56 ± 1.82 | 6 |
| PET hc | 49.15 ± 34.48 | 5 | 3.97 ± 1.34 | 5 |
Larvae that built an emergency case first and then a portable case are not listed
