Table 2.
Comparisons between the study sample and the age adjusted mean values from population norms for the SF-36 and NHP using one sample t-test
| Instrument | Study sample (n = 283) | Age adjusted population normsa | p value | Mean difference [95%CI] |
|---|---|---|---|---|
| Mean (SD) | Mean | |||
| SF-36 (0–100, 100 best) | ||||
| Physical functioning | 66.7 (20.5) | 92.1 | 0.001 | −25.4 [−27.5, −22.9] |
| Role Physical | 35.4 (40.5) | 84.0 | 0.001 | −48.6 [−52.6, −43.6] |
| Role Emotional | 86.3 (30.3) | 80.8 | 0.003 | 5.5 [1.8, 8.6] |
| Bodily pain | 55.8 (23.2) | 77.3 | 0.001 | −21.5 [−23.3, −18.2] |
| Social functioning | 49.1 (7.2) | 84.8 | 0.001 | −35.7 [− 36.6, − 35.0] |
| Mental health | 79.5 (11.5) | 77.1 | 0.001 | 2.4 [1.4, 4.0] |
| Vitality | 53.8 (10.7) | 56.1 | 0.001 | −2.3 [−3.4, −10] |
| General health perceptions | 55.3 (11.1) | 81.0 | 0.001 | −25.7 [− 26.9, − 24.5] |
| NHP (0–100, 0 best) | ||||
| Emotional reactions | 6.6 (11.5) | 14.2 | 0.001 | −7.6 [−8.9, −6.3] |
| Sleep | 22.9 (19.6) | 12.1 | 0.001 | 10.8 [8.1, 13.6] |
| Loss of Energy | 37.5 (32.5) | 15.6 | 0.001 | 22.9 [18.4, 25.7] |
| Pain | 27.5 (27.6) | 2.3 | 0.001 | 25.2 [21.3, 27.3] |
| Physical mobility | 20.3 (19.5) | 1.6 | 0.001 | 18.7 [16.3, 20.6] |
| Social isolation | 5.9 (13.2) | 6.1 | 0.775 | −0.2 [− 1.7, 1.3] |
CI confidence interval, SD standard deviation
aExpected age-adjusted means, computed using Norwegian (SF-36) and UK (NHP) population reference values