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. Author manuscript; available in PMC: 2018 Jul 3.
Published in final edited form as: Am J Health Promot. 2016 Jul 15;30(6):416–424. doi: 10.1177/0890117116658195

Table 2.

Adjusted Odds of Achieving the 7000-Step Goal During the Intervention and Follow-Up Periods.a,b,c

Model Arm Comparison Intervention (Weeks 1–13) Follow-Up (Weeks 14–26)
Odds Ratio (95% CI) P Value Odds Ratio (95% CI) P Value
Main model 50th vs 75th 1.12 (0.44–2.86) .81 0.98 (0.39–2.44) .97
50th + incentives vs 75th 2.50 (0.96–6.67) .06 1.82 (0.70–4.76) .22
75th + incentives vs 75th 1.61 (0.52–5.00) .42 2.08 (0.66–6.67) .21
50th + incentives vs 50th 2.25 (0.95–5.33) .06 1.84 (0.80–4.26) .15
75th + incentives vs 50th 1.43 (0.50–4.08) .50 2.13 (0.74–6.14) .16
50th + incentives vs 75th + incentives 1.59 (0.53–4.76) .41 0.87 (0.29–2.56) .80
Main model—adjusted by device 50th vs 75th 1.12 (0.46–2.78) .81 1.08 (0.50–2.33) .85
50th + incentives vs 75th 2.56 (1.01–6.67) .05 1.35 (0.60–3.03) .47
75th + incentives vs 75th 1.49 (0.50–4.55) .48 1.54 (0.60–4.00) .37
50th + incentives vs 50th 2.31 (1.00–5.32) .05 1.25 (0.62–2.52) .53
75th + incentives vs 50th 1.34 (0.48–3.69) .58 1.44 (0.60–3.47) .41
50th + incentives vs 75th + incentives 1.72 (0.60–5.00) .31 0.87 (0.35–2.17) .76
Main model—adjusted by device and with missing data as not meeting goal 50th vs 75th 1.39 (0.51–3.85) .53 1.41 (0.56–3.57) .46
50th + incentives vs 75th 3.57 (1.25–10.00) .02 1.96 (0.75–5.00) .17
75th + incentives vs 75th 1.82 (0.52–6.25) .35 1.32 (0.43–4.17) .63
50th + incentives vs 50th 2.61 (1.01–6.71) .05 1.38 (0.58–3.24) .46
75th + incentives vs 50th 1.31 (0.41–4.13) .65 0.93 (0.33–2.65) .90
50th + incentives vs 75th + incentives 2.00 (0.61–6.67) .26 1.47 (0.50–4.35) .48

Abbreviation: CI, confidence interval.

a

Device refers to type of smartphone.

b

Main model adjusts for repeated measures of daily participant step counts and for temporal trends by week using all collected data. Outcome measure is a binary term (0 or 1) based on not achieving or achieving goal.

c

Odds ratios represent the ratio of odds of achieving the 7000-step goal for a participant on a random day during either the intervention period (third column) or the follow-up period (fourth column) if a participant was to be assigned to the one specified study arm versus the other specified study arm.