Supporting maintenance of sugar-sweetened beverage reduction using automated versus live telephone support: findings from a randomized control trial

Table 3 Adjusted 6–18 months outcomes by randomized maintenance assignment in the SIPsmartER condition (n = 120)

	Change 6 to 18 months^a			Relative 6 to 18 month effects between conditions^a,b
Outcome	IVR behavior n = 47	Human-delivered behavior n = 46	IVR control n = 27	IVR behavior vs. IVR control	Human-delivered behavior vs. IVR control	IVR behavior vs. Human-delivered behavior
SSB, kcals	−12.1 (− 65, 41)	15.6 (− 47, 78)	86 (− 19, 192)	− 98.5 (− 196, − 0.55)*	−70 (− 209, 64)	27.7 (− 69.6, 125.2)
BMI, kg/m²	0.11 (−0.28, 0.51)	0.07 (− 57, .70)	− 0.07 (− 0.60, 0.46)	0.18 (− 0.37, 0.74)	0.13 (− 0.49, 0.76)	−0.05 (− 0.80, 0.70)
Weight, kg	0.04 (− 0.97, 1.1)	−0.17 (− 1.4, 1.13)	0.36 (− 1.7, 2.44)	−0.32 (− 2.7, 2.1)	−0.53 (− 2.9, 1.88)	−0.21 (− 1.9, 1.47)
QOL, # of unhealthy days	0.6 (−1.7, 2.9)	− 0.7 (− 3.7, 2.3)	2.4 (− 0.6, 5.4)	−1.8 (− 5.1, 1.4)	−3.1 (− 8.3, 2.1)	−1.3 (− 5.7, 3.2)

Within condition and between condition statistical significance indicated by asterisks: *p < 0.05
SSB=Sugar-sweetened beverages, BMI=Body Mass Index, QOL = Quality of Life
^aValues reported as mean change (95% Confidence Interval). All Δ change scores represent values from the first (earliest) time point subtracted from later time point
^bCondition dummy variable coded as interactive voice response (IVR) behavior support vs. IVR control condition; human-delivered behavior support vs. IVR control condition; IVR behavior support vs. human-delivered behavior support. Models controlled for baseline covariates including age, gender, race/ethnicity, income, education level, health literacy level, employment status, number of children, smoking status, and BMI. The 95% confidence intervals are also adjusted to be cohort robust. Analytic procedures use intention-to-treat last observation carried forward imputations and empirical models are multi-level mixed effect models

ISSN: 1479-5868