User Engagement Associated with Web-Intervention Features to Attain Clinically Meaningful Weight Loss and Weight Maintenance in Rural Women

Table 1

Women’s level of web-feature engagement^a (tertiles) by intervention phase.

Web feature	Low		Moderate		High
	Median (n)	Range	Median (n)	Range	Median (n)	Range
Phase 1^b initial weight loss (baseline–6 months)
Messages	21.5 (60)	0–49	79.5 (62)	51–98	122 (57)	99–199
Self-tracking	25 (60)	1–43	64 (62)	44–77	103 (57)	78–230
Phase 2^c weight maintenance (6–18 months)
Hot topic messages	0 (55)	0–2	9 (43)	3–18	33 (61)	19–71
Self-tracking	4 (49)	0–14	47 (51)	15–60	78 (59)	61–144

^aEngagement was measured by the number of “clicks” on a web-feature. Median is displayed due to nonnormal distributions and (n) represents the number of individuals in a tertile, noting tertile numbers may vary due to frequency of “clicks” clustered at or near the cut points. ^bPhase 1: women received a range of 1–5 new theory-based messages per week, posted once weekly over 26 weeks, for a total of 95. ^cPhase 2: women received 26 new hot topic messages posted biweekly during months 6 to 12 and posted monthly from months 12 to 18.