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Table 4 Personal activity intelligence (PAI) metrics during the blinded and un-blinded phases

From: Effect of personal activity intelligence (PAI) monitoring in the maintenance phase of cardiac rehabilitation: a mixed methods evaluation

  Blinded mean (SD) Un-blinded mean (SD) Mean difference (95% CI) p-value
Total PAI 68.4 (65.2) 97.6 (73.5) 29.2 (7.2, 51.2) 0.012*
PAI earned/day 9.9 (8.47) 12.0 (7.49) 2.1 (0.3, 4.0) 0.027*
PAI in low intensity 1.5 (1.65) 1.4 (1.5) -0.5 (-0.2,0.2) 0.71
PAI in medium intensity 5.4 (5.1) 6.4 (5.2) 1.0 (-0.3–2.1) 0.07
PAI in high intensity 3.1 (4.4) 4.2 (3.7 1.0 (0.4,3.0) 0.15
  Median (IQR) Median (IQR) p-value
Days > 25 PAI (%) 71.0 (5.77,100) 100 (73.5,100)   0.023*
Days > 50 PAI (%) 18.3 (0,100) 80.77 (28.9,100)   0.015*
Days > 75 PAI (%) 0 (0,100) 45.39 (0,100)   0.116
Days > 100 PAI (%) 0 (0, 94.65) 10 (0,100)   0.344
  1. SD, standard deviation; CI, confidence interval; IQR, inter quartile range, *statistically significant p < 0.05