. 2022 Jul 5;6(7):e37567. doi: 10.2196/37567

Table 2.

Theoretical Domains Framework (TDF) constructs, Risk Stratification and Early Alerting Regarding COVID-19 Hospitalization (RiskSEARCH) themes, and description.

TDF constructs	RiskSEARCH themes	Description
Environmental context and resources	Participant Situations: being sick with COVID-19 infection; caretaking responsibilities	Study participants were recruited and went through the study after testing positive for COVID-19 infection Study required steps that may have been more challenging for participants who had many caretaking responsibilities
Environmental context and resources	Getting Started: enrollment; kit components; for example, wearables; unknowns; suggestions	Participants had to self-navigate through a web-based enrollment system and website Current Health kit required setup by the participant themselves (though they did have access to technology and study team support) Communication between tablet or wearable and participant Wearable needed charging 30 minutes every 24 hours. Participant did not know the battery level of the wearable, but green lights on charger indicated that it was fully charged Suggestions for improving any aspect of the Current Health kit
Knowledge combined with skill	Study Support^a: personnel; materials	Technology support was available 24/7 to help with any aspect of setting up or using the wearable The study team was available on demand to answer any questions relating to the study or Current Health kit The Quick Start Guide was available in a hard-copy booklet in the Current Health kit or digitally accessible via the tablet “Study Support’ double coded with Social Influences”
Knowledge combined with skill	Study Communication^a: passive; active	Website as a source for information on the study and COVID-19 pandemic “‘Study Communication’ double coded with Social Influences”
Social or professional role and identity	Protecting and Contributing	Help or protect others; feeling a sense of community responsibility; wanting to help in a difficult time; being someone who helps Motivation to help others A sense of contributing toward the management of the COVID-19 pandemic
Beliefs about capabilities	Determination	The level of commitment while engaging with the Current Health kit—survey or tablet or wearable
Optimism	Study Pros and Cons	Positive and negative aspects of the study
Optimism	Optimism	Seeing the positive in the bad situation of being tested positive for COVID-19 infection
Beliefs about consequences	Uncertainty	Feedback regarding user’s “performance” or whether kit was working properly
Reinforcement	Payment	Study participants expressing their views on the US $100 offered for their time and effort
Reinforcement	Accessing Data	Having access to own data The wearable device does not transmit data to the participant
Memory, attention, and decision processes	Memory and Reminders	Remembering to charge and wear the wearable Reminders to take the survey every day Reminders to charge the tablet and take the survey
Social influences	Study Support^a: personnel	Possibility to contact technology support or study team “Double coded with Knowledge combined with Skill”
Social influences	Study Communication^a: active	Via email, text, or telephone call “‘Study Communication’ double coded with Knowledge combined with Skill”
Behavioral regulation	Making Habits	Habit formation around charging the wearable and tablet and taking the survey Ability to support routine or habit formation

^aMapped to 2 different domains from the TDF.