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. Author manuscript; available in PMC: 2018 Mar 29.
Published in final edited form as: Proc Am Stat Assoc. 2012;2012:4648–4660.

Table 4.

Logistic Model Output, Predicting Cooperative Contact on Second Dial After Non-Contacts or Answering Machine/Voicemail Outcomes on First Dial3

Lag Time (Reference Category = 2–3 days) Sample Lines with Non-Contact Outcome on First Dial Sample Lines with Answering Machine/Voicemail Outcome on First Dial
Landline Model (N=302,817) Cell Model (N=109,000) Landline Model (N=267,824) Cell Model (N=240,346)
Odds Ratio 95% CI Odds Ratio 95% CI Odds Ratio 95% CI Odds Ratio 95% CI
0–1 day 1.05 0.96 – 1.16 0.91 0.81 – 1.02 1.02 0.97 – 1.08 0.97 0.92 – 1.02
4–5 days 0.96 0.91 – 1.01 1.34 1.23 – 1.45 1.04 0.99 – 1.10 0.99 0.93 – 1.05
6+ days 0.85 0.81 – 0.90 1.15 1.07 – 1.23 0.98 0.93 – 1.02 1.01 0.96 – 1.07
3

These models also included the following predictors, which are eliminated here due to space concerns: day of week/time of day combination, month of survey (November or March), time zone of respondent.