Testing the Pragmatic Effectiveness of a Consumer-Based Mindfulness Mobile App in the Workplace: Randomized Controlled Trial

Jennifer L Huberty, Hallie M Espel-Huynh, Taylor L Neher, Megan E Puzia, Jennifer L Huberty, Hallie M Espel-Huynh, Taylor L Neher, Megan E Puzia

Abstract

Background: Mental health and sleep problems are prevalent in the workforce, corresponding to costly impairment in productivity and increased health care use. Digital mindfulness interventions are efficacious in improving sleep and mental health in the workplace; however, evidence supporting their pragmatic utility, potential for improving productivity, and ability to reduce employer costs is limited.

Objective: This pragmatic, cluster randomized controlled trial aimed to evaluate the experimental effects of implementing a commercially available mindfulness app-Calm-in employees of a large, multisite employer in the United States. Outcomes included mental health (depression, anxiety, and stress), sleep (insomnia and daytime sleepiness), resilience, productivity impairment (absenteeism, presenteeism, overall work impairment, and non-work activity impairment), and health care use (medical visit frequency).

Methods: Employees were randomized at the work site to receive either the Calm app intervention or waitlist control. Participants in the Calm intervention group were instructed to use the Calm app for 10 minutes per day for 8 weeks; individuals with elevated baseline insomnia symptoms could opt-in to 6 weeks of sleep coaching. All outcomes were assessed every 2 weeks, with the exception of medical visits (weeks 4 and 8 only). Effects of the Calm intervention on outcomes were evaluated via mixed effects modeling, controlling for relevant baseline characteristics, with fixed effects of the intervention on outcomes assessed at weeks 2, 4, 6, and 8. Models were analyzed via complete-case and intent-to-treat analyses.

Results: A total of 1029 employees enrolled (n=585 in the Calm intervention group, including 101 who opted-in to sleep coaching, and n=444 in waitlist control). Of them, 192 (n=88 for the Calm intervention group and n=104 for waitlist) completed all 5 assessments. In the complete-case analysis at week 8, employees at sites randomized to the Calm intervention group experienced significant improvements in depression (P=.02), anxiety (P=.01), stress (P<.001), insomnia (P<.001), sleepiness (P<.001), resilience (P=.02), presenteeism (P=.01), overall work impairment (P=.004), and nonwork impairment (P<.001), and reduced medical care visit frequency (P<.001) and productivity impairment costs (P=.01), relative to the waitlist control. In the intent-to-treat analysis at week 8, significant benefits of the intervention were observed for depression (P=.046), anxiety (P=.01), insomnia (P<.001), sleepiness (P<.001), nonwork impairment (P=.04), and medical visit frequency (P<.001).

Conclusions: The results suggest that the Calm app is an effective workplace intervention for improving mental health, sleep, resilience, and productivity and for reducing medical visits and costs owing to work impairment. Future studies should identify optimal implementation strategies that maximize employee uptake and large-scale implementation success across diverse, geographically dispersed employers.

Trial registration: ClinicalTrials.gov NCT05120310; https://ichgcp.net/clinical-trials-registry/NCT05120310.

Keywords: mental health; mindfulness; mobile apps; presenteeism; workforce; workplace.

Conflict of interest statement

Conflicts of Interest: JLH and HME-H disclose that they receive an annual salary from the Calm app and hold stock within the company. However, their salary and equity are not dependent on the results of their research. MEP discloses that she is a paid contractor (ie, research coordinator) of the Calm app.

©Jennifer L Huberty, Hallie M Espel-Huynh, Taylor L Neher, Megan E Puzia. Originally published in JMIR mHealth and uHealth (https://mhealth.jmir.org), 28.09.2022.

Figures

Figure 1
Figure 1
CONSORT (Consolidated Standards of Reporting Trials) diagram of study participation and analyzed data. *Note that participants may have been ineligible for more than one reason, all of which are reflected here. During the trial, participants could complete a subsequent assessment even if they missed a prior one.
Figure 2
Figure 2
Estimated marginal means indicating group differences in changes in mental health outcomes over time among study completers. *P<.05; **P<.01; ***P<.001. DASS-21: Depression Anxiety Stress Scale-21 item.
Figure 3
Figure 3
Estimated marginal means indicating group differences in changes in sleep outcomes over time among study completers. *P<.05; **P<.01; ***P<.001. ESS: Epworth Sleepiness Scale; ISI: Insomnia Severity Index.
Figure 4
Figure 4
Estimated marginal means indicating group differences in absenteeism and presenteeism over time among study completers. *P<.05; **P<.01; ***P<.001. WPAI: work productivity and activity impairment.
Figure 5
Figure 5
Estimated marginal means indicating group differences in changes in work and nonwork activity impairment over time among study completers. *P<.05; **P<.01; ***P<.001. WPAI: work productivity and activity impairment.
Figure 6
Figure 6
Estimated marginal means indicating group differences in costs of work impairment over time among study completers.
Figure 7
Figure 7
Average Calm app use per employee per week during the intervention period. This figure depicts the overall app use data (use of any component of the app), as well as the use of the most popular components. Less used components are not included in the figure such that the sum of the components presented does not encompass all app use.

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