Table 5 Stratified analysis of the extent of nausea caused by palate and tongue cleaning

Sex

Male

1 (0–5)

2 (0–4)

 − 0.336

0.737

2 (0–3)

1 (0–3)

 − 1.588

0.112

Female

1 (0–2)

1 (0–2)

 − 2.434

0.015

1 (0–3.5)

1 (0–3)

 − 2.574

0.010

Height

 ≥ 163.00 cm

1 (0–3)

1 (0–3)

 − 1.036

0.300

2 (0–3)

1 (0–2)

 − 3.121

0.002

 < 163.00 cm

1 (0–2)

1 (0–2)

 − 2.061

0.039

1 (0–4)

2 (0–4)

 − 1.088

0.277

BMI

Overweight and obese

1 (0–3)

1 (0–3)

 − 0.427

0.669

1 (0–3)

1 (0–2)

 − 1.681

0.093

Normal

1 (0–2)

1 (0–2)

 − 1.984

0.047

2 (0–4)

1 (0–3)

 − 2.416

0.016

Underweight

2 (1–4)

2 (1–3)

 − 1.026

0.305

2 (0–4)

2 (0–3)

 − 0.966

0.334