Table 3.
Factors measured in early pregnancy by women with and without persistent back pain post partum
| |
Back pain group |
No back pain group |
|
||
|---|---|---|---|---|---|
| n | Mean (SD) or n (%) | n | Mean (S.D.) or n (%) | p value | |
| AA in early pregnancy (°) |
16 |
44.1 (6.3) |
154 |
39.7 (7.0) |
0.019 |
| AA pp – AA early pregnancy (°) |
16 |
1.0 (7.1) |
150 |
1.8 (5.0) |
0.69 |
| Age (yr) |
16 |
29.1 (5.5) |
155 |
27.7 (4.4) |
0.25 |
| Weight (kg) |
16 |
67.0 (6.9) |
154 |
63.4 (8.9) |
0.12 |
| Height (m) |
16 |
1.66.1 (0.05) |
153 |
1.66 (0.06) |
0.86 |
| Body mass index (kg/m2) |
16 |
24.4 (2.8) |
153 |
22.9 (2.9) |
0.06 |
| Cigarette smoking (%) |
16 |
12 (2/16) |
155 |
23 (35/155) |
0.18 |
| No. of previous pregnancies |
16 |
1.6 (1.1) |
154 |
0.8 (0.8) |
0.0006 |
| No. of previous deliveries |
16 |
1.0 (0.8) |
154 |
0.46 (0.6) |
0.002 |
| Time since previous delivery (yr) |
11 |
3.5 (3.7) |
60 |
3.3 (3.7) |
0.88 |
| Previous back pain, not in pregnancy (%) |
16 |
44 (7/16) |
155 |
57 (88/155) |
0.13 |
| Back pain in previous pregnancy (%) | 13 | 77 (10/13) | 89 | 34 (30/89) | 0.003 |
AA = passive abduction angle of left fourth finger, pp = post partum.
Legend: Factors measured in early pregnancy by women reporting back pain induced in pregnancy and persisting 3 months post partum and those without such pain. Numbers of previous pregnancies and deliveries, abduction angle in early pregnancy and reported back pain in previous pregnancy were factors that significantly differed between the groups.