Background
Methods
Participants and procedures
Measures
Demographics and physical measurements
Physical activity
Data analysis
Results
Participant characteristics
Active-Duty (n = 204) | Other TRICARE Beneficiary (n = 226) | Overall (N = 430) | ||
---|---|---|---|---|
N (%) | N (%) | p | N (%) | |
Race | 0.001 | |||
Black or African American | 43 (21.1%) | 21 (9.3%) | 64 (14.9%) | |
White | 134 (65.7%) | 158 (69.9%) | 292 (67.9%) | |
Other racial groups | 27 (13.2%) | 47 (20.8%) | 74 (17.2%) | |
Body Mass Index (BMI) | 0.001 | |||
Healthy | 65 (31.9%) | 76 (33.6%) | 141 (32.8%) | |
Overweight | 98 (48.0%) | 74 (32.7%) | 172 (40.0%) | |
Obese | 41 (20.1%) | 76 (33.6%) | 117 (27.2%) | |
Previous Live Birth | 0.03 | |||
Yes | 102 (50.0%) | 137 (60.6%) | 239 (55.6%) | |
No | 102 (50.0%) | 89 (39.4%) | 191 (44.4%) | |
Intervention Assignment | 0.49 | |||
GWG-only/GWG + PPWL | 140 (68.6%) | 148 (65.5%) | 288 (67%) | |
PPWL only | 64 (31.4%) | 78 (34.5%) | 142 (33%) | |
Baseline Physical Activity | ||||
150 + min moderate activity – Self- Report | 172 (85.2%) | 203 (90.2%) | 0.11 | 375 (87.8%) |
150 + min moderate activity – Accelerometer | 131 (99.2%) | 130 (96.3%) | 0.21 | 261 (97.8%) |
32 Weeks Physical Activity | ||||
150 + min moderate activity – Self- Report | 163 (91.6%) | 182 (92.4%) | 0.77 | 345 (92%) |
150 + min moderate activity – Accelerometer | 89 (98.9%) | 90 (94.7%) | 0.21 | 179 (96.8%) |
Age (M (SD)) | 30.6 (5.2) | 30.7 (4.5) | 0.89 | 30.6 (4.9) |
Active Duty | Other TRICARE Beneficiary | Overall | ||||
---|---|---|---|---|---|---|
Average Daily Physical Activity (in minutes) | Baseline M (SD) | 32 Weeks M (SD) | Baseline M (SD) | 32 Weeks M (SD) | Baseline M (SD) | 32 Weeks M (SD) |
Accelerometer | N = 132 | N = 90 | N = 135 | N = 95 | N = 267 | N = 185 |
Moderate | 109.1 (54.6) | 102.2 (61.1) | 112.9 (72) | 117.8 (69.8) | 111.0 (63.9) | 110.2 (66.0) |
Vigorous | 0.7 (1.76) | 0.18 (0.7) | 0.45 (1.65) | 0.36 (1.54) | 0.57 (1.7) | 0.27 (1.21) |
Self-report | n = 202 | n = 178 | n = 225 | n = 197 | n = 427 | n = 375 |
Moderate | 130.4 (126.5) | 147.6 (142.1) | 136.8 (134.6) | 168.9 (151.9) | 133.8 (130.7) | 158.9 (147.5) |
Vigorous | 41.7 (75) | 29.9 (68.8) | 20 (41.6) | 47.9 (91.7) | 30.2 (60.7) | 39.3 (82) |
Self-report and accelerometer agreement
Predicting physical activity at 32-Weeks gestation
Predicting Self-Reported 32-Week Moderate Physical Activity | Predicting Self-Reported 32-Week Vigorous Physical Activity | |||||
---|---|---|---|---|---|---|
Logit | NB | |||||
B(SE) | p | B(SE) | p | B | p | |
Military Status | ||||||
Active Duty | 17.2 (20.5) | 0.40 | -0.27 (0.26) | 0.30 | 0.63(0.37) | 0.09 |
Other TRICARE beneficiary | Reference | |||||
Body Mass Index | ||||||
Normal Weight | Reference | |||||
Overweight | 16.1 (27.1) | 0.55 | 0.19 (0.31) | 0.52 | 0.13 (0.4) | 0.76 |
Obese | -2.7 (23.4) | 0.91 | 0.47 (0.34) | 0.17 | -0.02 (0.46) | 0.97 |
Baseline activity | 0.58 (0.07) | < 0.0001 | 0.01 (0.002) | 0.02 | -0.02 (0.01) | 0.0002 |
Predicting Accelerometer-Measured 32-Week Moderate Physical Activity | Predicting Accelerometer-Measured 32-Week Vigorous Physical Activity | |||||
Logit | NB | |||||
B(SE) | p | B(SE) | p | B | p | |
Military Status | ||||||
Active Duty | -15.4 (8.8) | 0.08 | -2.7(0.81) | 0.0008 | -25.1(121,081) | 1.00 |
Other TRICARE beneficiary | Reference | |||||
Body Mass Index | ||||||
Normal Weight | Reference | |||||
Overweight | 6.8 (10) | 0.4959 | 2.06 (0.83) | 0.01 | 1.7 (2.1) | 0.41 |
Obese | -1.8 (11.6) | 0.8774 | -0.5 (0.95) | 0.59 | -22.6 (118,166) | 1.00 |
Baseline activity | 0.47 (0.07) | < 0.0001 | 0.62 (0.22) | 0.006 | 0.15 (0.28) | 0.60 |