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Table 1 Study population characteristics at baseline

From: Effects of longitudinal changes in Charlson comorbidity on prognostic survival model performance among newly diagnosed patients with hypertension

Study population characteristics Number %
Total Patients 453,734  
Age, years   
 20-49 139,110 30.6
 50-64 168,998 37.2
 65-74 81,930 18.1
 ≥75 63,696 14
Mean (SD) 57.52 (14.63)  
Median Income quintile   
 1 (Lowest) 91,891 20.3
 2 86,694 19.1
 3 84,876 18.7
 4 81,269 17.9
 5 (Highest) 79,287 17.5
 Missing 29,717 6.5
Region of Residence   
 Urban 366,226 80.7
 Rural 86,253 19
 Missing 1255 0.3
Mortality during follow-up 72,490 15.98
Duration of Follow-up   
 Median Years (IQR) 5.75 (5.74-5.76)  
  1. Abbreviations: SD standard deviation, CI confidence interval, IQR inter-quartile range