Table 5.
Variable | GERD | All | *P value | Younger GERD | Younger | *P value |
Patients | Controls | Patients | Controls | |||
n = 105 | n = 50 | n = 13 | n = 25 | |||
Salivary flow volume; Saxon test (g/2 min.) | 1.7 ± 1.5 | 3.6 ± 1.5 | < 0.001* | 1.8 ± 1.3 | 4.2 ± 1.4 | < 0.001* |
Swallowing function; RSST | ||||||
Swallowing frequency (times/30 s) | 4.0 ± 2.1 | 6.9 ± 2.5 | < 0.001* | 4.3 ± 1.3 | 8.1 ± 2.4 | < 0.001* |
Time to first swallow (s) | 4.9 ± 4.8 | 2.1 ± 1.1 | < 0.001* | 4.7 ± 3.4 | 1.6 ± 1.2 | < 0.001* |
Teeth; DMF indices (%) | 70.2 ± 23.7 | 47.9 ± 37.6 | < 0.001* | 50.5 ± 23.9 | 14.9 ± 13.1 | < 0.001* |
Soft tissues; gingivitis | ||||||
PMA gingival indexes | 1.58 ± 1.98 | 0.2 ± 0.4 | < 0.001* | 1.20 ± 1.80 | 0.04 ± 0.20 | 0.428 |
OHI-S | 1.41 ± 1.45 | 0.3 ± 0.6 | < 0.001* | 1.10 ± 1.30 | 0.08 ± 0.28 | 0.226 |
Variable | Older GERD | Older | *P value | |||
Patients | Controls | |||||
n = 92 | ||||||
Salivary flow volume; Saxon test (g/2 min.) | 1.7 ± 1.6 | 3.0 ± 1.3 | < 0.001* | |||
Swallowing function; RSST | ||||||
Swallowing frequency (times/30 s) | 4.0 ± 2.2 | 5.7 ± 2.1 | < 0.001* | |||
Time to first swallow (s) | 4.9 ± 5.0 | 2.5 ± 0.9 | 0.090 | |||
Teeth; DMF indices (%) | 73 ± 22.4 | 80.8 ± 21.1 | 0.101 | |||
Soft tissues; gingivitis | ||||||
PMA gingival indexes | 1.6 ± 2.0 | 0.36 ± 0.49 | < 0.001* | |||
OHI-S | 1.5 ± 1.5 | 0.56 ± 0.77 | < 0.001* |
GERD Gastroesophageal reflux disease, RSST Repetitive saliva swallowing test, DMF indices Decayed, missing, and filled indices, PMA gingival indexes Papillary, marginal, and attached gingival indexes, OHI-S Simplified oral hygiene indices
*P values of Wilcoxon rank-sum test were judged as significant by P < 0.05