Table 4.
Stepwise Regression Analyses Predicting Second and Third Trimester Exercise Behavior with TPB Beliefs.
| Variable | R2 | df | F | β 1 | β 2 | % below advocacyd |
|---|---|---|---|---|---|---|
| Predicting Second Trimester EX Behavior | ||||||
| T1 Behavioral Beliefs | ||||||
| NW (N=149) | ||||||
| Model 1 | 0.06 | 1, 147 | 9.26** | |||
| Decrease discomfort/soreness | 0.24** | 38% | ||||
| OW/OB (N=68) | ||||||
| Model 1 | 0.10 | 1, 172 | 1.11** | |||
| Decrease discomfort/soreness | 0.32** | 35% | ||||
| T1 Control Beliefs | ||||||
| NW (N=148) | ||||||
| Model 1 | 0.11 | 1, 146 | 18.81*** | |||
| Being tired or fatigued | −0.34*** | −0.25** | 49% | |||
| Model 2 | 0.16 | 2, 145 | 13.48** | |||
| Having family responsibilities | −0.23** | 72% | ||||
| OW/OB (N=68) | ||||||
| Model 1 | 0.26 | 1,66 | 22.81*** | |||
| Having no motivation to exercise | −0.51** | 64% | ||||
| Predicting Third Trimester PA Behavior | ||||||
| T2 Behavioral Beliefs b | ||||||
| OW/OB (N=73) | ||||||
| Model 1 | 0.08 | 1,71 | 6.23* | |||
| Control my weight | 0.28* | 19% | ||||
| T2 Normative Beliefs c | ||||||
| OW/OB (N = 71) | ||||||
| Model 1 | 0.07 | 1,69 | 5.39* | |||
| Friends | 0.27* | 15% | ||||
| T2 Control Beliefs | ||||||
| NW (N=172) | ||||||
| Model 1 | 0.15 | 1, 170 | 30.52*** | |||
| No time to exercise | −0 39*** | −0.36*** | 75% | |||
| Model 2 | 0.17 | 1, 174 | 17.68*** | |||
| Feeling lazy | −0.15* | 86% |
Notes. TPB = Theory of Planned Behavior; EX = exercise; NW = normal weight, OW = overweight, OB = obese;
a
no T1 normative beliefs emerged as significant predictors of T2 EX behavior in the NW or OW/OB groups;
b
no T2 behavioral beliefs emerged as significant predictors of T3 EX behavior in the NW group;
c
no T2 normative beliefs emerged as significant predictors of T3 EX behavior in the NW group;
d
There were no significant differences between parity groups in belief advocacy; Bold % below advocacy indicates low advocacy (i.e., >50% below advocacy);
*
p < 0.05
**
p < 0.01
***
p < 0.001.