Table 2. Association between age and various parameters.
| Parameter | rho | P value |
|---|---|---|
| EPM | ||
| Reflux index | 0.29 | 0.14 |
| Events | 0.16 | 0.41 |
| Mean duration (sec) | 0.27 | 0.16 |
| Longest AGER (min) | 0.18 | 0.35 |
| Events >5 min | 0.38 | 0.047* |
| DeMeester score | 0.47 | 0.011* |
| EPM-MII | ||
| GER | 0.20 | 0.30 |
| AGER | 0.29 | 0.13 |
| NAGER | −0.11 | 0.57 |
| %BCT | 0.21 | 0.29 |
| Median BCT (sec) | 0.29 | 0.13 |
| Proximal GER | 0.49 | 0.34 |
| Proximal AGER | 0.28 | 0.15 |
| Proximal NAGER | −0.04 | 0.85 |
| CC, pH nadir, ppFEV1 | ||
| AN-CC | −0.02 | 0.83 |
| PSPW | −0.037 | 0.85 |
| pH nadir | 0.09 | 0.65 |
| ppFEV1 | −0.494 | 0.0007** |
*P<0.05, **P<0.001. EPM, esophageal pH monitoring; MII, multichannel intraluminal impedance; GER, gastroesophageal reflux; AGER, acid GER; NAGER, non-acid GER; BCT, bolus contact time; rho, Spearman coefficient; CC, chemical clearance; AN-CC, acid neutralization during chemical clearance; PSPW, post-reflux swallow-induced peristaltic wave; ppFEV1, percent predicted forced expiratory volume in one minute; pH nadir, lowest median pH. CC was assessed using both the AN-CC and PSPW.