Table 5.
Aspiration Relative to Airway Closure
| Measure | Non‐Aspirators | ASP. Before (18%) (mean, SD) | ASP. During (6%) (mean, SD) | ASP. After (53%) (mean, SD) | Sig. Diffs. by Aspiration Site (B,D,A) |
|---|---|---|---|---|---|
| Hyoid Displacement (Hmax) (cm) | 1.94 | 1.61* (.73) | 1.44* (82) | 1.45* (.83) | BxD, ns; BxA, ns; DxA, ns |
| Hyoid‐Larynx Approximation (HL) (cm) | 1.21 | 1.22 (.68) | .80*(.57) | .87* (.60) | BxD, P < .00; BxA, P < .00; DxA, ns |
| Pharyngoesophageal Segment Opening (PESmax) (cm) | .80 | .79 (.30) | .68 (.23) | .65* (.29) | BxD,ns; BxA, P < .00; DxA,ns |
| Pharyngeal Constriction Ratio (PCR) | .19 | .17 (.16) | .31* (.29) | .46* (.31) | BxD, P < .00; BxA, P < .00; DxA, P < .00 |
| Pharyngeal Transit Time (TPT) (secs) | 1.39 | 1.95* (.85) | 1.91* (.75) | 1.76* (.82) | BxD, ns; BxA, ns; DxA, ns |
Mean values of selected objective measures in non‐aspirators, and in aspirators according to time of aspiration relative to airway closure (before, during, after). Age and gender were covariates. Significant differences in each Aspirator group (B,D,A) as compared to non‐aspirators are indicated by asterisks. In the last column, differences between aspirator groups (B&D, B&A, D&A) are presented.