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Table 1 Characteristics of subjects who were mailed questionnaires and of enrolled subjects.

From: Factors associated with influenza vaccination status of residents of a rural community in Japan

  Mailed Responded  
Age group Total Total Males Females Unknown Response rate
Under 1 year 11 5 4 1 0 45%
1 year 16 9 5 4 0 56%
2 years 9 3 3 0 0 33%
Preschool 60 24 12 12 0 40%
Elementary school 102 39 20 19 0 38%
Junior-high school 75 37 14 21 2 49%
High school 70 26 13 13 0 37%
Unknown but <18 years   1 0 1 0  
18 to 29 years 363 110 55 55 0 30%
30 to 49 years 537 229 90 137 2 43%
50 to 64 years 693 304 139 162 3 44%
65 to 79 years 532 275 135 138 2 52%
80 years or older 197 100 39 58 3 51%
Unknown but ≥18 years   20 5 4 11  
Total 2665 1182 534 625 23 44%