Compartment | NO
| P | NE
| RDI | Χ2
| Fraction of total Χ2
|
|---|
Air
| 348 | 2251 | 378 | 0.920 | 2.42 | 0.071 |
Epi/Endo
| 29 | 151 | 25 | 1.143 | 0.52 | 0.015 |
CT
| 28 | 63 | 11 | 2.645 | 28.64 | 0.842 |
Caplum
| 44 | 207 | 35 | 1.265 | 2.44 | 0.072 |
Total
| 449 | 2672 | 449 | Â | 34.02 | Â |
- Note. From the observed number of particles (NO) and the number of points (P) on each compartment the expected number of particles (NE) was calculated (e.g. NE (air) = 449 × (2251/2672) = 378). The RDI is calculated from NO/NE (e.g. RDI (air) = 348/378 = 0.92). The chi-squared (Χ2) values are calculated from (NO - NE)2/NE (e.g. Χ2 (air) = (348–378)2/378 = 2.42). With three degrees of freedom (2-1 groups × 4-1 compartments) and a total chi-squared value of 34.02, the null-hypothesis of random distribution has to be rejected (p < 0.01). The connective tissue has an RDI of 2.645 and a partial chi-squared value that contributes about 84% of the total chi-squared. It is the only compartment that meets both criteria for a preferential deposition. Abbreviations: Air: Air space; Epi/Endo: Epithelial/endothelial cells; CT: Connective tissue; Caplum: Capillary lumen. Χ2: Chi-squared test values. NO: Observed number of particles. NE: Expected number of particles. RDI: Relative deposition index.
