Table 2

Annual healthcare utilisation before and after the index date among secure patient–clinician email users and non-users

MHM usersMHM non-usersDifference in differences (95% CI)p Value
BeforeAfterp ValueBeforeAfterp Value
Office visits*3.23.30.063.33.30.570.1 (0.0 to 0.2)0.33
Patient-initiated calls*4.13.8<0.00014.24.10.05−0.1 (−0.3 to 0.0)0.14
Scheduled telephone visits†279.2280.90.89287.8310.10.0720.7 (−57.2 to 12.9)0.23
After-hours office visits†77.081.60.3772.874.10.763.3 (−11.2 to 15.1)0.62
ED visits†130.2127.60.69131.4134.50.635.6 (−21.6 to 12.0)0.53
Inpatient stays†64.665.80.8164.165.00.850.35 (−13.9 to 15.7)0.96
  • *Mean per member per year.

  • †Mean per 1000 members per year.

  • ED, emergency department; MHM, MyHealthManager.