Table 3.
Differences between groups of women with and without self-reported PGP, and women with severe and less severe PGP on the SF-36 and NHP, using t-tests, Mann-Whitney U tests and Hodges-Lehman estimate of difference in the median of the 2 groups
| Instrument | Without PGP (n = 104) | With PGP (n = 179) | p-value | Mean difference [95%CI] | Less severe PGP (n = 155) | Severe PGP (n = 24) | p-value | Mean difference [95%CI] |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||||
| SF-36 (0–100; 100 best) | ||||||||
| Physical functioning | 78.0 (13.0) | 60.3 (21.3) | 0.001 | −17.7[−21.5,-14.1] | 63.5 (20.1) | 39.2 (16.7) | 0.001 | −24.3 [−31.5, − 16.7] |
| Role Physical | 56.1 (42.6) | 23.6 (34.2) | 0.001 | −32.5[−41.8,-23.0] | 25.8 (35.2) | 9.3 (23.1) | 0.019 | −19.5 [−26.3, −3.4] |
| Role Emotional | 87.1 (29.2) | 85.9 (31.0) | 0.747 | −1.2 [−8.4. 6.7] | 87.1 (30.0) | 77.9 (36.3) | 0.110 | −9.2 [−27.1, 2.8] |
| Bodily pain | 74.3 (18.6) | 44.0 (18.3) | 0.001 | −29.3[−34.6,-25.9] | 46.8 (17.7) | 33.4 (18.7) | 0.001 | −13.4 [−21.3,-5.3] |
| Social functioning | 50.1 (5.6) | 48.6 (7.8) | 0.323 | −1.5 [−3.0, 0.6] | 48.1 (7.6) | 52.1 (8.8) | 0.049 | 4.0 [0.6, 8.1] |
| Mental health | 80.9 (10.1) | 78.7 (12.2) | 0.080 | −2.2 [−0.2, 5.3] | 79.0 (11.9) | 76.5 (14.1) | 0.516 | −2.5 [−9.3, 3.0] |
| Vitality | 56.4 (9.9) | 52.3 (10.9) | 0.001 | −4.1 [−6.6, −1.8] | 52.5 (11.1) | 50.9 (9.4) | 0.378 | −1.6 [−5.8, 2.5] |
| General health perceptions | 53.4 (10.9) | 56.4 (11.0) | 0.020 | 3.0 [0.04, 5.4] | 55.5 (10.5) | 61.9 (13.0) | 0.039 | 6.4 [0.5, 11.4] |
| Median (IQR) | Median (IQR) | p-value | Intergroup comparison Median [95% CI]a |
Median (IQR) | Median (IQR) | p-value | Intergroup comparison Median [95% CI]a |
|
| NHP (0–100; 0 best) | ||||||||
| Emotional reactions | 0.0 (0.0, 6.5) | 0.0 (0.0, 11.8) | 0.016 | 0.0 [0.0, 0.0] | 0.0 (0.0, 8.6) | 8.4 (0.0, 14.3) | 0.053 | 0.0 [0.0, 8.2] |
| Sleep | 11.1 (0.0, 33.1) | 22.0 (0.0, 22.0) | 0.002 | 2.4 [0.0, 11.1] | 22.0 (0.0, 41.7) | 33.1 (22.0, 62.9) | 0.025 | 11.1 [0.0, 22.0] |
| Energy | 23.8 (0.0, 36.8) | 23.8 (23.8, 60.6) | < 0.001 | 23.8 [13.0, 23.8] | 23.8 (23.8, 60.6) | 60.5 (23.7, 90.8) | 0.006 | 23.8 [0.0, 36.8] |
| Pain | 0.0 (0.0, 60.0) | 38.0 (19.3, 38.3) | < 0.001 | 36.2 [28.2, 38.1] | 37.4 (10.9, 54.7) | 63.5 (41.7, 77.2) | < 0.001 | 26.1 [15.6, 36.5] |
| Physical mobility | 10.1 (0.0, 10.5) | 20.7 (10.1, 42.9) | < 0.001 | 17.5 [10.5, 20.6] | 20.6 (10.1, 38.1) | 45.9 (35.5, 53.2) | < 0.001 | 24.2 [15.1, 31.7] |
| Social isolation | 0.0 (0.0, 0.0) | 0.0 (0.0, 0.0) | 0.001 | 0.0 [0.0, 0.0] | 0.0 (0.0, 0.0) | 0.0 (0.0, 24.9) | 0.299 | 0.0 [0.0, 0.0] |
PGP pelvic girdle pain, SD standard deviation, IQR interquartile range, a Hodges-Lehman estimate of difference in the median of the 2 groups with 95% CI