A. | Â | Â | Â | Â | Â |
|---|
Cohort | n | Mean Survival | Median Survival | % extension of Median | p-value |
|---|
CF | 110 | 25.1 ± 0.5 | 23 | - | - |
BD | 74 | 34.3 ± 0.9 | 34 | 48 | 1.4 × 10-15 |
BD + LB | 94 | 35.9 ± 0.8 | 37 | 61 | 1.4 × 10-19 |
BD + sup | 116 | 30.2 ± 0.8 | 31 | 35 | 2.3 × 10-07 |
Agar Barrier | 113 | 29.6 ± 0.8 | 31 | 35 | 4.0 × 10-05 |
B.
| Â | Â | Â | Â | Â |
| Â |
CF
|
BD
|
BD + LB
|
BD + sup
|
Agar Barrier
|
CF | - | 1.4E-13 | 1.4E-19 | 2.3E-07 | 4.0E-05 |
BD | - | - | 2.6E-01 | 1.0E-03 | 7.7E-04 |
BD + LB | - | - | - | 2.2E-06 | 2.6E-06 |
BD + sup | - | - | - | - | 6.4E-01 |
Agar Barrier | - | - | - | - | - |
- Life span was measured for N2 on plates with food (control fed, CF), plates without food (bacterial deprivation, BD), BD plates treated with LB (BD + LB) or cell-free supernatant from an E. coli OP50 culture (BD + sup), or plates containing a lawn of E. coli OP50 beneath the surface of the agar (Agar Barrier). (A) The number of animals (n), mean survival (± standard error, SE), median survival, percent extension of the median, and p-values are given for each strain and condition. Data shown here are pooled from two independent trials. P-values were calculated by the Wilcoxon Rank-Sum test using the MATLAB 'ranksum' function. (B) Pair-wise comparisons to test for significant differences between median life span were made for each experimental condition and p-values are given for each pair.
