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Table 2 Zero-Order Correlation Between Variables

From: Perceived stress and depressive symptoms not neuropsychiatric symptoms predict caregiver burden in Alzheimer’s disease: a cross-sectional study

  Patient Caregiver
CDR ADL NPI Sex Age Education PHQ-9 PSS ZBI-12
CDR 1         
ADL −0.799** 1        
NPI-Q 0.186 −0.142 1       
Sex 0.088 −0.063 − 0.232* 1      
Age 0.215* −0.268** − 0.021 0.069 1     
Education − 0.029 0.004 0.023 0.005 −0.279** 1    
PHQ-9 0.242* −0.310** 0.254** 0.146 0.006 0.141 1   
PSS 0.113 −0.121 0.311** 0.029 −0.208* 0.233* 0.490** 1  
ZBI-12 0.163 −0.187 0.370** −0.098 0.002 0.193 0.540** 0.569** 1
  1. ADL Activities Daily Living (to assess patient’s functional status), CDR Clinical Dementia Rating (to assess patient’s disease severity), NPI Neuropsychiatric Inventory Questionnaires (to assess patient’s neuropsychiatric symptoms), PHQ-9 Patient Health Questionnaire-9 (to assess caregivers’ depressive symptoms), PSS Perceived Stress Scale (to assess perceived stress of caregiver), ZBI Zarit Burden Interview (to assess caregiver burden)
  2. *p < 0.05, **p < 0.01