Print versus a culturally-relevant Facebook and text message delivered intervention to promote physical activity in African American women: a randomized pilot trial

Table 4 BMI and Social Cognitive Theory outcomes

		Baseline		8-Weeks
Variable	Range^a	M (SD)	Median	M (SD)	Median	Baseline to 8-week change	Unadjusted baseline to 8-week change	Adjusted between group difference in baseline to 8 week change	Effect size^d
Variable	Range^a	M (SD)	Median	M (SD)	Median	Mean (SD)	P ^b	P ^c	η ²
BMI (weight [kg]/height [m ² ])
Facebook (n = 14)	19.90-55.00	30.01 (7.58)	28.05	29.95 (7.31)	27.60	-.06 (.82)	.866	.502	.082
Print (n = 15)		32.29 (8.34)	30.20	32.62 (8.21)	30.90	.32 (1.76)	.718
Outcome expectations
Facebook (n = 14)	1-5	4.31 (0.40)	4.39	4.46 (.36)	4.44	.15 (.32)	.114	.001	.392
Print (n = 15)		3.94 (.55)	4.00	4.200 (4.29)	4.11	.26 (.49)	.081
Self-regulation
Facebook (n = 14)	1-5	1.69 (.56)	1.55	3.21 (.47)	3.22	1.51 (.63)	<.001	<.001	.575
Print (n = 15)		1.76 (.38)	1.80	2.73 (.45)	2.50	.96 (.69)	<.001
Self-efficacy
Facebook (n = 14)	1-5	3.58 (.61)	3.57	3.73 (.72)	3.57	1.14 (.49)	.385	.280	.092
Print (n = 15)		3.53 (.63)	3.38	3.76 (.74)	3.64	.23 (.71)	.246
Social support from friends
Facebook (n = 14)	8-40	18.62 (7.81)	20.00	23.85 (7.66)	26.66	5.23 (9.77)	.099	.366	.080
Print (n = 15)		17.57 (8.94)	15.50	19.57 (11.29)	16.00	3.47 (8.90)	.403
Social support from family
Facebook (n = 14)	10-50	20.64 (4.60)	20.00	27.00 (8.29)	24.50	3.36 (9.44)	.030	.044	.262
Print (n = 15)		17.78 (5.69)	16.00	20.38 (9.59)	17.00	2.71 (10.23)	.671

^aBMI range is the observed minimum and maximum for entire sample; questionnaire range scores are the potential range for each respective measure (the higher the score the more favorable the outcome).
^bWilcoxon signed rank for baseline to 8 week change.
^cMann–Whitney p-value examining the difference in baseline to 8-week change values between groups. BMI = Body Mass Index.
^dEta squared effect size estimates for ANCOVA models controlling from baseline values.

ISSN: 1472-6874