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Table 3 Univariable logistic regression analysis of the Training Cohorts

From: A web-based dynamic Nomogram for predicting instrumental activities of daily living disability in older adults: a nationally representative survey in China

Variables RR(95% CI) P value
Age (years)   <0.001
 60 ~ 1.000 (Reference)  
 65 ~ 1.293 (1.038 ~ 1.610) 0.022
 70 ~ 2.060 (1.650 ~ 2.571) <0.001
 75 ~ 3.136 (2.520 ~ 3.902) <0.001
Education   <0.001
 Illiterate 1.000 (Reference)  
 Primary school 0.622 (0.515 ~ 0.752) <0.001
 Middle school 0.445 (0.334 ~ 0.593) <0.001
 High school 0.261 (0.153 ~ 0.444) <0.001
 College and above 0.170 (0.062 ~ 0.465) 0.001
Social activity   <0.001
 Never 1.000 (Reference)  
 Not regularly 0.820 (0.631 ~ 1.066) 0.138
 Almost Weekly 0.586 (0.436 ~ 0.789) <0.001
 Almost daily 0.671 (0.552 ~ 0.815) <0.001
Smoking   0.075
 Never 1.000 (Reference)  
 Quit 1.225 (0.972 ~ 1.544) 0.086
 Less than 20 /day 0.850 (0.652 ~ 1.107) 0.227
 More than 20 /day 0.870 (0.685 ~ 1.105) 0.254
Drinking   <0.001
 Never 1.000 (Reference)  
 Quit 0.825 (0.630 ~ 1.082) 0.165
 Less than once/month 0.603 (0.422 ~ 0.860) 0.005
 More than once/month 0.667 (0.547 ~ 0.814) <0.001
Self-report health condition   <0.001
 Very good 1.000 (Reference)  
 Good 1.297 (0.642 ~ 2.621) 0.468
 Fair 1.522 (0.784 ~ 2.958) 0.215
 Poor 2.413 (1.251 ~ 4.656) 0.009
 Very poor 3.592 (1.842 ~ 7.006) <0.001
Comorbidity condition   <0.001
 0 1.000 (Reference)  
 1 1.176 (0.945 ~ 1.463) 0.147
  ≥ 2 1.572 (1.289 ~ 1.919) <0.001
Gait speed 0.238 (0.164 ~ 0.345) <0.001
Cognitive function 0.883 (0.867 ~ 0.900) <0.001
Depression
 Normal 1.000 (Reference)  
 Depression 1.691 (1.379 ~ 2.075) <0.001
Marital status   
 Married/Cohabitated 1.000 (Reference)  
 Other 1.353 (1.120 ~ 1.635) 0.002
Gender
 Male 1.000 (Reference)  
 Female 1.268 (1.083 ~ 1.485) 0.003
duration of night sleep (hours)   0.001
 7–8 1.000 (Reference)  
  < 7 1.260 (1.062 ~ 1.495) 0.008
  > 8 1.538 (1.155 ~ 2.048) 0.003
BMI   <0.001
 Normal 1.000 (Reference)  
 Underweight 1.221 (0.955 ~ 1.562) 0.112
 Overweight 0.733 (0.612 ~ 0.878) 0.001
  1. All analyses were conducted at a 5% significance level; CI confidence interval