Table 2. Observed SF-36, EQ-5D and SOM scale (SCL-90) scores (mean values and 25th–75th percentile score intervals) of participating women at T0, T1 and T2; comparison with (age-/sex-adjusted) reference scores.
| T0 (n=329): mean (25th–75th percentile) | T1 (n=316): mean (25th–75th percentile) | T2 (n=288): mean (25th–75th percentile) | Reference scores SF-36: Dutch general populationa | Reference scores SF-36: USA general populationb | Reference scores EQ-5Dc and SOM scaled | |
|---|---|---|---|---|---|---|
| SF-36 (score 100–0) | ||||||
| Physical functioning | 89.9 (85.0–100.0) | — | 89.4 (85.0–100.0) | 86.3* | 86.1* | |
| Role – physical | 85.7 (100.0–100.0) | — | 84.1 (100.0–100.0) | 77.6* | 82.8 | |
| Bodily pain | 82.4 (72.0–100.0) | — | 83.0 (72.0–100.0) | 72.8* | 75.0* | |
| General health perceptions | 76.4 (67.0–92.0) | — | 77.3 (67.0–92.0) | 72.2* | 72.7* | |
| Vitality | 67.1 (55.0–80.0) | — | 68.9 (55.0–80.0) | 64.8 | 59.3* | |
| Social functioning | 87.7 (75.0–100.0) | — | 87.9 (75.0–100.0) | 83.5* | 83.0* | |
| Role – emotional | 85.2 (100.0–100.0) | — | 88.1 (100.0–100.0) | 80.1† | 81.2† | |
| Mental health | 76.8 (68.0–88.0) | — | 77.7 (68.0–88.0) | 74.4† | 73.4* | |
| SF-36 summary scores | ||||||
| Physical component summary | 52.5 (49.8–57.7) | — | 52.3 (49.2–57.7) | 50.0* | 50.7* | |
| Mental component summary | 51.2 (48.3–57.8) | — | 52.2 (48.6–58.0) | 50.1 | 49.1* | |
| EQ-5D | ||||||
| Utility score (score 1–0) | 0.88 (0.80–1.00) | — | 0.88 (0.80–1.00) | 0.85* | ||
| VAS (self-rated health today) (score 100–0) | 81.9 (73.0–90.0) | 79.0 (70.0–90.0) | 80.7 (70.0-90.0) | 86.9* | ||
| SOM scale SCL-90 (score 12–60) | 17.5 (14.0–19.0) | — | 17.1 (13.0–19.0) | 18.7‡ | ||
SOM=somatic subscale; SCL-90=Symptom Checklist-90; SF-36=Medical Outcomes Study 36-Item Short Form; VAS=visual analogue scale.
Age- and sex-adjusted SF-36 reference scores (women of 16–65 years of age) from the Dutch general population (Aaronson et al, 1998). Scores were assigned to the sample of participating women at T0, based on their age at T0.
Age- and sex-adjusted SF-36 reference scores (women of 18–64 years of age) from the USA general population (Ware et al, 1993, 1994). Scores were assigned to the sample of participating women at T0, based on their age at T0.
Age- and sex-adjusted EQ-5D reference scores (women of 20–69 years of age) from the Swedish general population (Burström, 2003). Scores were assigned to the sample of participating women at T0, based on their age at T0.
Sex-adjusted SOM scale reference scores (women of 18–83 years of age) from the Dutch general population (Arrindell and Ettema, 1986).
Statistically significant (P-value ⩽0.01) difference between observed scores of participating women at T0 and age-and sex-adjusted reference scores (one sample t-test with best value 0).
Statistically significant (P value ⩽0.05) difference between observed scores of participating women at T0 and age- and sex-adjusted reference scores (one-sample t-test with test value 0).
Statistically significant (P-value ⩽0.01) difference between observed scores of participating women at T0 and sex-adjusted reference scores (two independent samples t-test with unequal variances).