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Table 1 Comparison of survey metrics by modality and incentive

From: Comparing methods of performing geographically targeted rural health surveillance

Survey metrics Mailed survey Phone survey In-person survey
Contact rate
 Overall 76.0% (69.5–81.7%) 33.2% (26.6–40.2%) 100% (Not Applicable)
 $10 Incentive 73.0% (63.2–81.4%) 27.6% (19.0–37.5%) 100% (Not Applicable)
 $20 Incentive 76.0% (69.7–86.5%) 38.8% (29.1–49.2%) 100% (Not Applicable)
Cooperation rate
 Overall 31.6% (24.3–39.6%) 24.6% (14.8–36.9%) 71.4% (61.4–80.1%)
 $10 Incentive 27.6% (18.0–39.1%) 33.3% (16.5–54.0%) 57.8% (42.2–72.3%)
 $20 Incentive 35.5% (24.9–47.3%) 18.4% (7.7–34.3%) 83.0% (70.2–91.9%)
Eligibility rate
 Overall 100% (Not Applicable) 80.0% (56.3–94.3%) 40.7% (33.3–48.4%)
 $10 Incentive 100% (Not Applicable) 81.8% (48.2–97.7%) 32.1% (22.2–43.4%)
 $20 Incentive 100% (Not Applicable) 77.8% (40.0–97.2%) 48.4% (37.7–59.1%)
Response rate
 Overall 24.0% (18.3–30.5%) 8.2% (4.7–12.9%) 71.4% (61.4–80.1%)
 $10 Incentive 21.0% (13.5–30.3%) 9.2% (4.3–16.7%) 57.8% (42.2–72.3%)
 $20 Incentive 27.0% (18.6–36.8%) 7.1% (2.9–14.2%) 83.0% (70.2–91.9%)
Eligible survey responses
 Total number 48 of 200 16 of 200 70 of 200
  1. Survey metrics based on standardized AAPOR definitions: contact rate (CON1), cooperation rate (COOP2), eligibility rate (ELG), and response rate (RR2)
  2. 95% confidence intervals in parentheses