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Table 2 Adjusted odds ratio of the probability of absence of influenza vaccination among elderly persons with multiple chronic diseases

From: Absence of influenza vaccination among high-risk older adults in Taiwan

Variables Odds Ratio 95% CI P-value
Individual factors    
   Age    
65-69 1   
70-74 1.14 [1.05 -1.24] < 0.01
75-79 1.14 [1.04 -1.25] < 0.01
≥ 80 1.07 [0.98-1.17] 0.19
   Gender    
Men 1   
Women 1.14 [1.07 -1.22] < 0.01
   Charlson Comorbidity Index    
0 1   
1 2.53 [2.26 - 2.84] < 0.01
2 3.92 [3.51 - 4.38] < 0.01
≥ 3 4.93 [4.47 - 5.42] < 0.01
Health care utilizations    
   Received flu shot at 2004-2005 flu season    
Yes 1   
No 4.26 [3.97 - 4.56] < 0.01
Hospital factors    
   Hospital level    
Medical Center 1   
Regional hospitals 0.93 [0.83 - 1.05] 0.43
District hospitals 0.78 [0.67 - 0.91] < 0.01
Clinics 0.84 [0.72 - 0.98] < 0.01
   Teaching status    
Teaching 1   
Non-Teaching 0.98 [0.87 - 1.11] 0.27
   Ownership    
Public 1   
Non-for-profit 1.03 [0.92 - 1.15] 0.56
For profit 0.91 [0.83 - 1.01] 0.61
   Specialty divisions    
Internal medicine 1   
Family medicine 0.82 [0.73 - 0.93] < 0.01
Other specialties 0.80 [0.75 - 0.87] < 0.01
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