Table 3.

Number of steps completed among 92 intervention and 75 control participants

VariableInterventionControlDifference in Differences
Patients (n)Mean Baseline Step ± SEMMean Final Step ± SEMDifference (95% CI)Patients (n)Mean Baseline Step ± SEMMean Final Step ± SEMDifference (95% CI)Difference (95% CI)P Value
All participants922.1±0.25.6±0.13.5 (3.1–4.0)752.0±0.23.6±0.31.6 (1.2–2.0)1.9 (1.3–2.5)<0.001
Sex
 male472.0±0.35.6±0.13.8 (3.2–4.5)472.1±0.23.7±0.31.6 (1.1–2.3)2.1 (1.2–2.9)<0.001
 female452.2±0.25.6±0.23.4 (3.1–3.8)282.0±0.23.5±0.51.5 (1.0–2.3)1.9 (1.1–2.7)<0.001
Race
 black652.1±0.25.6±0.13.5 (3.1–3.9)492.2±0.23.8±0.41.6 (1.2–2.3)1.9 (1.1–2.6)<0.001
 white172.4±0.35.8±0.43.4 (2.5–4.6)211.8±0.33.8±0.41.8 (1.4–2.3)1.7 (0.6–2.8)0.003
 other101.9±0.15.1±0.43.5 (2.4–5.2)51.8±0.42.5±0.60.6 (0.1–2.7)2.8 (1.2–4.4)<0.001
Baseline step
 suitability391.0±0.05.2±0.24.3 (4.0–4.7)351.0±0.02.5±0.41.4 (0.8–2.3)2.9 (2.1–3.7)<0.001
 interest32.0±0.04.6±0.72.6 (1.5–4.4)82.0±0.03.1±0.41.2 (0.6–2.2)1.4 (-0.2–3.0)0.09
 referral call463.0±0.05.8±0.22.8 (2.4–3.3)263.0±0.04.9±0.31.9 (1.3–2.7)1.0 (0.2–1.8)0.02
 first visit44.0±0.06.9±0.33.1 (2.5–4.0)64.0±0.05.9±0.62.0 (1.3–3.1)1.2 (0.02–2.3)0.05
  • CI, confidence interval.