Table 1 Socio-demographic data between head and neck cancer patients with and without pneumonia acquired during radiotherapy (PNRT)

Men

< 0.0001

Age (years)

< 0.0001

  < 50

  50~64

  ≥ 65

  Mean (SD)

< 0.0001

Hospital level

0.001

  Medical center

  Regional hospital

  District hospital / clinic

Treatment

  Neck lymph node dissection

0.003

  Gastrostomy

< 0.0001

  Concurrent chemotherapy

0.85

Comorbidity

  Dementia

0.28^†

  Stroke

<0.0001

  Parkinson’s disease

0.005^†

  GERD

0.004