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Table 3 Pre- and post-intervention outcomes for ActiGraph accelerometer and Exercise Vital Sign measured physical activity

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

 

Baseline

8-weeks

Statistical tests

Variable

M (SD)

Median (min, max)

25th & 75th percentiles

M (SD)

Median (Range)

25th & 75th Percentiles

Baseline to 8-week change

Unadjusted within group baseline to 8-week change

Adjusted between group difference in baseline to 8-week change

Effect sized

Mean (SD)

P b

P c

η 2

Accelerometer outcomes

          

Sedentary (0 – 99 ctm a )

          

Facebook (n = 13)

7811 (547)

7591 (6598, 8444)

7613, 8229

7740 (545)

7605 (6946, 8592)

7403, 8333

−71 (379)

.542

.026

.251

Print (n = 15)

7797 (549)

7887 (6578, 8498)

7499, 8330

7916 (628)

8046 (6746, 8882)

7576, 8399

118 (753)

.639

  

Light activity (100–759 ctm)

          

Facebook (n = 13)

1218 (345)

1061 (843, 1969)

972, 1410

1313 (319)

1259 (756, 1803)

1008, 1596

95 (210)

.146

.024

.263

Print (n = 15)

1175 (268.)

1193 (834, 1683)

878, 1381

1234 (312)

1225 (743, 2010)

962, 1418

59 (401)

.421

  

Moderate-lifestyle (760–1951 ctm)

          

Facebook (n = 13)

461 (220)

418.0 (198, 824)

216, 713

489 (195)

515 (125, 730)

336, 665

27 (112)

.558

.001

.419

Print (n = 15)

463 (242)

382 (197, 1076)

314, 556

429 (178)

356 (159, 744)

273, 556

−34 (248)

.901

  

Moderate activity (1952–5725 ctm)

          

Facebook (n = 13)

122 (67)

133 (26, 252)

61, 180

113 (63)

109 (24, 220)

59, 164

−9 (78)

.635

.422

.069

Print (n = 15)

132 (99)

120 (10, 332)

57, 201

135 (125)

98 (7, 502)

58, 195

0 (82)

.773

  

Vigorous activity (>5725 ctm)

          

Facebook (n = 13)

2 (5)

0 (0, 19)

0, 0

12 (3)

0 (0, 12)

0, 2

-.31 (7)

.906

n/a

.459

Print (n = 15)

8 (11)

0 (0, 34)

0, 11

4 (10)

0 (0, 38)

0, 3

−4 (12)

.438

  

Total moderate-to-vigorous activity (>1951 ctm)

          

Facebook (n = 13)

123 (69)

137 (23, 252)

61, 180

116 (64)

112 (24, 220)

596, 165

−9 (78)

.735

.327

.089

Print (n = 15)

140 (107)

120 (10, 343)

63, 225

139 (129)

98 (7, 513)

61, 195

−1 (87)

.890

  

Moderate-to-vigorous activity in 10 minutes bouts or greater (>1951 ctm)

          

Facebook (n = 13)

22 (27)

10 (0, 85)

0, 40

26 (35)

11 (0, 106)

0, 41

4 (45)

.910

.637

.036

Print (n = 15)

33 (44)

12 (0, 121)

0, 40

36 (72)

0 (0, 258)

0, 68

3 (57)

.831

  

Exercise vital sign c (minutes/week)

          

Facebook (n = 14)

91 (120)

60 (0, 450)

18, 98

153 (120)

110 (20, 450)

75, 217

62 (169)

.025

.015

.483

Print (n = 15)

101 (90)

90 (10, 360)

30, 120

108 (1445)

90 (0, 600)

40, 100

7 (194)

.801

  
  1. Facebook = Facebook and text message intervention (n = 13 for accelerometer outcomes because one participant did not provide valid wear time for analysis at 8-weeks); Print = Print-based intervention (n = 15 for accelerometer outcomes).
  2. All reported physical activity values are in in minutes/week and are rounded to the nearest integer.
  3. actm = counts per minute.
  4. bWilcoxon signed rank P for within group baseline to 8 week change.
  5. cBetween group differences in baseline to 8-week physical activity changes calculated using ANCOVAs and adjusted for baseline physical activity levels.
  6. dEta squared effect size estimates for ANCOVA models controlling from baseline physical activity levels.
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BMC Women's Health

ISSN: 1472-6874

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