Table 1.

Frequency of assessment of variables in the ToDAy study for the tailored feedback, active control, and online control groups.

Variables	Group	Baseline	6 months	12 months
Health status EQ-5Da, a 5-item scale to assess utility and health-related quality of life [31]	TFb, ACc, OCd	Yes	Yes	Yes
Height and body mass (self-report)	TF, AC, OC	Yes	Yes	Yes
Height, body mass, body mass index, waist, and hip girthe	TF, AC	Yes	Yes	Yes
Sociodemographics and personal characteristics assessed via questions on sex, age, eating behavior, educational level, country of birth, ethnicity, socioeconomic status, and financial status	TF, AC, OC	Yes	Yes	Yes
Australian eating survey, an online food frequency questionnaire with options for automated dietary feedback previously validated in adults [32]	TF, AC, OC	Yes	Yes	Yes
Dietary intake assessed by 4-day mFRf	TF, AC	Yes	Yes	Yes
Mobile food record usability to assess user feedback and method preference [33,34]	TF, AC	Yes	Yes	Yes
Three-factor eating survey to measure factors associated with eating behavior: cognitive restraint of eating, disinhibition, and hunger [35]	TF, AC	Yes	—g	—
Self-reported physical activity assessed via The International Physical Activity Questionnaire (short form) [36]	TF, AC, OC	Yes	Yes	Yes
Cardiorespiratory fitness determined by distance covered in the 6-minute walk test to assess change in submaximal exercise capacity [30]	TF, AC	Yes	Yes	Yes
Physical activity and sedentary behavior assessed with GT3X+ Actigraph accelerometer to quantify change in average minutes of moderate-to-vigorous physical activity and sedentary time	TF, AC	Yes	Yes	Yes
Sleep-quality assessment using the Pittsburgh Sleep Quality Index seven-component evaluation of sleep quality, latency, duration, habitual sleep efficiency, sleep disturbances, use of sleeping medications, and daytime dysfunction over the previous month [37]	TF, AC	—	Yes	Yes
Depression, anxiety, stress scale, with 21 self-report items to assess severity of depression, anxiety, and stress [38]	TF, AC, OC	Yes	Yes	Yes
Fear of negative evaluation, with twelve 5-point items to assess concern about being perceived unfavorably [39]	TF, AC	Yes	—	—
Social desirability to measure social approval and acceptance [40]	TF, AC	Yes	—	—
Habit Index Score [41]	TF, AC	Yes	Yes	Yes
Weight-loss history, an 8-item tool to assess previous weight-loss history [42]	TF, AC, OC	—	—	—
Technology use questionnaire to assess duration and frequency of technology use indicative of sedentary behaviors [43]	TF, AC, OC	Yes	Yes	Yes
Feedback evaluation questionnaire for activity-monitor usability, physical activity, and dietary feedback evaluation	TF	—	Yes	Yes

^aEQ-5D: EuroQol-5D.

^bTF: tailored feedback.

^cAC: active control.

^dOC: online control.

^eHeight measured in centimeters via stadiometer using stretch stature method, body mass measured in kilograms via weighing scale in minimal clothing at similar time of the day, body mass index calculated as kilogram per meter squared, waist measured in in centimeters via tape at the narrowest point between the lower costal border and iliac crest, and hip girth measured via tape at the level of the greatest posterior protuberance.

^fmFR: mobile food record.

^gNot assessed.