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. 2021 Feb 12;21:67. doi: 10.1186/s12903-021-01414-5

Table 4.

Nausea extent and cleaning time for the two directions for cleaning the palate and tongue

Palate Tongue
Extent of nausea Z P-value Extent of nausea Z P-value
Sagittal cleaning Group A 1 (0–3) 0.047 0.962 2 (0–3.25)  − 0.639 0.523
Sagittal cleaning Group B 1 (0–3) 1 (0–3)
Coronal cleaning Group A 1 (0–2.75) 0.179 0.858 1 (0–3)  − 1.297 0.195
Coronal cleaning Group B 1 (0–2) 2 (0–3)
Palate Tongue
Time (s) t P-value Time (s) t P-value
X ± SD X ± SD
Sagittal cleaning 7.92 ± 3.02  − 2.116 0.036 6.68 ± 2.24  − 2.054 0.042
Coronal cleaning 7.46 ± 2.64 6.36 ± 2.22