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Table 1 Response rate by respondent population and demographic subpopulations

From: Telephone follow-up to a mail survey: when to offer an interview compared to a reminder call

  Interview Group (n = 435) Reminder Group (n = 438)  
  n (%) response p* n (%) response p* p**
STUDY RESPONDENT: Completed Survey and HIPAA Authorization Form
Total 128 (29.4%)   106 (24.2%)   0.08
   Mail Survey 23 (5.3%)   106 (24.2%)   < 0.0001
   Phone Interview 105 (24.1%)   NA   (only applies to interview group)
Gender      
   Male 65 (26.2%) 0.09 65 (23.5%) 0.64 0.47
   Female 63 (33.7%)   41 (25.5%)   0.10
Age Group      
   18-24 6 (31.6%) 0.03 4 (36.4%) 0.01 0.79
   25-34 18 (26.1%)   22 (29.0%)   0.70
   35-44 23 (20.4%)   15 (11.8%)   0.07
   45-54 37 (28.9%)   34 (28.3%)   0.92
   55-64 32 (42.1%)   22 (31.4%)   0.18
   65+ 12 (40.0%)   9 (26.5%)   0.25
GENERALIZABLE RESPONDENT: Completed Survey Regardless of HIPAA Authorization Form
Total 187 (43.0%)   106 (24.2%)   < 0.0001
   Mail Survey 24 (5.5%)   106 (24.2%)   0.50
   Phone Interview 163 (37.5%)   NA   (only applies to interview group)
Gender      
   Male 97 (39.1%) 0.06 65 (23.5%) 0.64 < 0.001
   Female 90 (48.1%)   41 (25.5%)   < 0.001
Age Group      
   18-24 9 (47.4%) 0.08 4 (36.4%) 0.01 0.56
   25-34 28 (40.6%)   22 (29.0%)   0.14
   35-44 39 (34.5%)   15 (11.8%)   < 0.001
   45-54 53 (41.4%)   34 (28.3%)   0.03
   55-64 42 (55.3%)   22 (31.4%)   0.004
   65+ 16 (53.3%)   9 (26.5%)   0.03
  1. * Within group
  2. ** Between groups