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Table 4 Spearman rho correlation for rating* their health status as poor to excellent (C1 component) with demographic variables, stratified health conditions, NHANES, 2001–2012

From: Non-alcoholic Fatty Liver Disease (NAFLD) is associated with impairment of Health Related Quality of Life (HRQOL)

  rho , P
Variables Total (overall), HCV NAFLD Heart disease Diabetes
n = 9661 n = 346 n = 3333 n = 1145 n = 1477
Age (years) 0.14, <0.01 0.11, 0.03 0.10, <0.01 −0.12, <0.01 −0.06, 0.06
Body Mass Index (BMI) (kg/m2) 0.23, <0.01 0.16, 0.04 0.12, <0.01 0.16, <0.01 0.13, <0.01
Gender (1 = male and 0 = female) −0.06, <0.01 −0.11, 0.08 −0.16, <0.01 −0.12, <0.01 −0.13, <0.01
White (1 = yes and 0 = no) −0.19, <0.01 −0.10, 0.09 −0.16, <0.01 −0.20, <0.01 −0.14, <0.01
Black (1 = yes and 0 = no) 0.06, <0.01 0.08, 0.30 −0.01, 0.44 0.11, <0.01 0.02, <0.01
Other (1 = yes and 0 = no) 0.15, <0.01 0.04, 0.43 0.18, <0.01 0.13, <0.01 0.13, <0.01
C2: days physical health, which includes physical illness and injury not good 0.30, <0.01 0.45, <0.01 0.34, <0.01 0.41, <0.01 0.39, <0.01
C3: days mental health, which includes stress, depression, and problems with emotions not good 0.17, <0.01 0.30, <0.01 0.21, <0.01 0.28, <0.01 0.26, <0.01
C4: days poor physical or mental health keep him/her from doing your usual activities, such as self-care, work, or recreation not good 0.21, <0.01 0.39, <0.01 0.24, <0.01 0.28, <0.01 0.27, <0.01
  1. *Ranges from 1 to 5 with a higher score indicates worse self-health assessment (1 = excellent; 2 = very good; 3 = good; 4 = fair; and 5 = poor)