Table 3.
Results of multiple regression analysis
| 12 weeks of pregnancy | 24 weeks of pregnancy | 30 weeks of pregnancy | 36 weeks of pregnancy | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Independent variable | Regression coefficient | 95% CI | Independent variable | Regression coefficient | 95% CI | Independent variable | Regression coefficient | 95% CI | Independent variable | Regression coefficient | 95% CI |
| Crouching | 0.929 | -1.04-2.90 | Cough | 2.988 | -0.73-6.70 | Crouching | 0.570 | -1.08-2.22 | Crouching | 0.595 | -2.11-3.30 |
| Hanging out the washing | 1.251 | -1.15-1.71 | Crouching | 0.571 | -0.82-1.96 | Hanging out the washing | 3.259 | -1.01-7.53 | Driving | -1.369 | -3.80-1.07 |
| Lifting heavy objects | 2.639 | -0.68-5.96 | Hanging out the washing | 0.727 | -2.98-4.43 | Lifting heavy objects | -0.103 | -4.37-4.16 | Hanging out the washing | 0.608 | -2.58-3.80 |
| Lying down | 0.308 | -4.44-5.05 | Lying down | 1.525 | 0.07-3.22 | Lying down | 4.799 | 0.54-9.06 | Lying down | 1.469 | -1.03-3.96 |
| Picking child up | 1.886 | -0.40-4.18 | Picking child up | -1.600 | -4.23-1.03 | Picking child up | 2.685 | -1.95-7.32 | Picking child up | -0.105 | -2.76-2.55 |
| Piggyback | -2.004 | -6.58-2.57 | Piggyback | 0.958 | -1.72-3.64 | Piggyback | 0.593 | -3.71-4.90 | Piggyback | -0.611 | -5.84-4.62 |
| Sitting up | -0.851 | -2.27-0.36 | Sitting up | 1.102 | 0.05-1.82 | Sitting up | 0.376 | -0.55-1.30 | Sitting up | 0.347 | -0.66-1.36 |
| Standing up from chair | 1.679 | 0.37-2.99 | Standing up from chair | 0.486 | -0.39-1.36 | Standing up from chair | 1.245 | 0.21-2.29 | Standing up from chair | 1.392 | 0.28-2.50 |
| Stepping the stairs | -0.234 | -4.91-4.44 | Stepping the stairs | 1.000 | -2.72-4.72 | Stepping the stairs | -0.944 | -5.29-3.40 | Tossing and turning | 1.945 | 1.02-2.87 |
| Stretching body | 2.011 | -2.99-7.01 | Stretching body | -0.290 | -4.00-3.42 | Tossing and turning | 0.966 | -0.10-2.03 | Walking | 1.285 | -0.08-2.65 |
| Tossing and turning | 1.395 | 0.02-2.77 | Tossing and turning | 1.561 | 0.52-2.60 | Walking | 0.408 | -1.38-2.20 | Washing dishes | 3.523 | -3.40-10.45 |
| Vacuum cleaning | 4.153 | -0.35-8.65 | Walking | -0.403 | -1.57-0.76 | BMI at 30 weeks of pregnancy | 0.038 | -0.08-0.16 | LBP before pregnacy | 0.318 | -0.44-1.08 |
| Walking | 0.174 | -2.12-2.47 | Washing dishes | 0.986 | -2.73-4.70 | LBP before pregnacy | 0.392 | -0.29-1.08 | BMI at 36 weeks of pregnancy | 0.017 | -0.12-0.15 |
| BMI at 12 weeks of pregnancy | 0.023 | -0.11-0.16 | BMI at 24 weeks of pregnancy | -0.008 | -0.03-4.70 | ||||||
| LBP before pregnacy | 0.629 | -0.36-1.62 | LBP before pregnacy | 1.274 | 0.67-1.88 | ||||||
The data in bold is statisticaly significant
CI confidence interval, LBP Low back pain