HNA data and EQ-5D results were obtained for 337 individuals as not every client opts to have a HNA. Three participants were removed for having baseline and follow-up scores recorded less than 14 days apart, and two outliers were removed for reporting an unusually large number of concerns in their HNA. A total of 332 individuals were analysed. Table 2 shows descriptive summaries of the data, and the bivariate associations with change in utility scores, and change in VAS post intervention, respectively. In summary, the majority of participants were aged between 50-64 years, 59% were female, most resided in areas of high deprivation and cancer type and stage were varied.
Variable
|
n(%)
|
N
|
Missing values
|
Change in
EQ-5D
utility score
|
Change in
EQ-5D VAS
|
|
|
|
N=331
|
N (%)
|
p
|
p
|
|
Age:
|
|
330
|
1 (0.3%)
|
.13
|
.41
|
1
|
25 to 49 years
|
32 (9.70%)
|
|
|
|
|
|
50 to 64 years
|
127 (38.5%)
|
|
|
|
|
|
65 to 74 years
|
112 (33.9%)
|
|
|
|
|
|
75 years and over
|
59 (17.9%)
|
|
|
|
|
|
Gender:
|
|
325
|
6 (1.8%)
|
.73
|
.87
|
2
|
Female
|
192 (59.1%)
|
|
|
|
|
|
Male
|
133 (40.9%)
|
|
|
|
|
|
Cancer type:
|
|
331
|
0 (0%)
|
.51
|
.64
|
1
|
Colorectal
|
29 (8.76%)
|
|
|
|
|
|
Breast
|
71 (21.5%)
|
|
|
|
|
|
Lung
|
72 (21.8%)
|
|
|
|
|
|
Other
|
131 (39.6%)
|
|
|
|
|
|
Prostate
|
28 (8.46%)
|
|
|
|
|
|
Cancer stage at 1st assessment:
|
|
273
|
58 (17.5%)
|
.030*
|
.62
|
1
|
Living with condition
|
55 (20.1%)
|
|
|
|
|
|
Receiving palliative care
|
26 (9.52%)
|
|
|
|
|
|
Recently completed treatment (within 1 month)
|
17 (6.23%)
|
|
|
|
|
|
Recently diagnosed (1 month)
|
35 (12.8%)
|
|
|
|
|
|
Undergoing tests
|
18 (6.59%)
|
|
|
|
|
|
Undergoing treatment
|
122 (44.7%)
|
|
|
|
|
|
Cancer stage post intervention:
|
|
322
|
9 (2.7%)
|
.37
|
.025*
|
1
|
Living with condition
|
144 (44.7%)
|
|
|
|
|
|
Receiving palliative care
|
55 (17.1%)
|
|
|
|
|
|
Recently completed treatment (within 1 month)
|
28 (8.70%)
|
|
|
|
|
|
Recently diagnosed (1 month)
|
1 (0.31%)
|
|
|
|
|
|
Recurrence
|
1 (0.31%)
|
|
|
|
|
|
Undergoing tests
|
9 (2.80%)
|
|
|
|
|
|
Undergoing treatment
|
84 (26.1%)
|
|
|
|
|
|
Palliative:
|
|
276
|
55 (16.6%)
|
.049*
|
.029*
|
2
|
No
|
217 (78.6%)
|
|
|
|
|
|
Yes
|
59 (21.4%)
|
|
|
|
|
|
Deprivation (1=most deprived)
|
3.00 [1.00;8.00]
|
331
|
0 (0%)
|
.80
|
.64
|
3
|
Number concerns reported
|
4.00 [3.00;5.00]
|
331
|
0 (0%)
|
.012*
|
.13
|
3
|
Time elapsed between assessments (days)
|
84.0 [55.0;152]
|
331
|
0 (0%)
|
.0027**
|
<.001***
|
3
|
Mean change in concerns between assessments
|
-3.57 (2.48)
|
331
|
0 (0%)
|
.0064**
|
<.001***
|
3
|
|
|
|
|
|
|
|
Footnotes:
|
Tests of association: 1 - ANOVA, 2 - Welch's t-test, 3 - Spearman’s rank correlation
|
* < .05; ** < .01; *** < .001
|
Table 2. Descriptive summaries
Primary Hypothesis
- There will be a significant difference between EQ-5D scores at baseline and EQ-5D scores post intervention.
Table 2 presents the mean (SD) scores on the EQ-5D-3L utility measure and visual analogues scale (VAS) at time 1 and time 2. Both EQ-5D measures increased, indicating an improvement in health status A paired-samples t-test was used to determine whether there was a statistically significant mean difference. The distributions of change scores for EQ-5D utility scores and VAS were asymmetrical with heavier tails on the positive side, and a large proportion of 0 values. However, because the sample size was sufficiently large, the t-test was assumed to be sufficiently robust to non-normality (Lund & Lund, 2019).
|
|
Utility score
|
|
VAS
|
|
|
M (SD)
|
SE
|
|
M (SD)
|
SE
|
Baseline (Time 1)
|
|
0.455 (0.305)
|
0.017
|
|
49.1 (18.6)
|
1.025
|
Follow-up
(Time 2)
|
|
0.576 (0.262)
|
0.014
|
|
56.9 (18.3)
|
1.006
|
|
M
|
CI (M)
|
p
|
Cohen's D
|
CI (Cohen's D)
|
Utility score
|
0.121
|
0.0891-0.153
|
<.001
|
0.425
|
0.271-0.579
|
VAS
|
7.81
|
5.88-9.74
|
<.001
|
0.422
|
0.268-0.577
|
Table 3. Descriptives and analyses for primary hypothesis
The increase in EQ-5D utility scores of 0.121 at follow-up was statistically significant (t(330)=7.48, p<.001), as was the increase in VAS of 7.81 (t(330)=7.96, p<.001). Confidence intervals of the means estimates and effect sizes are in Table 3. Both Cohen’s d effect sizes were approximately 0.42, which are considered small to moderate. The hypothesis of a significant difference between baseline and follow-up on EQ-5D scores was supported.
Secondary hypothesis
- There will be a relationship between changes in self-reported health related quality of life and: cancer type, cancer stage, number of concerns expressed, and change in severity of concerns pre and post intervention.
Bivariate associations between EQ-5D scores and age group, gender, cancer type, cancer stage, palliative care, deprivation level, number of concerns reported, time elapsed between EQ-5D assessments and mean change in concerns between assessments can be found in Table 4. Variables that were statistically significantly (p < .05) associated with EQ-5D scores were entered into multiple regression models (Table 4). The variables used were: time elapsed between EQ-5D assessments, mean change in concerns between assessments, and palliative care, with the EQ-5D utility score model also using number of concerns as predictor.
Following assumption testing (13), the omnibus test of the EQ-5D utility score model was significant at F(4,271) = 13.9, p < .001, adj. R2 = .158, with regression terms Mean change in concern severity between assessments significant at p < .001, Palliative care significant at p < .01, and Number of concerns significant at p < .05. Time elapsed between assessments was not a significant predictor. The omnibus test of the VAS score model was significant at F(3,272) = 8.6, p < .001, adj. R2 = .076, with regression terms Time elapsed between assessments, Mean change in concern severity between assessments significant at p<.001, and Palliative care statistically significant at p < .0001. Regression coefficients, robust standard errors and confidence intervals for both models can be found in Table 4.
HNA average score decreased, indicating a reduction in severity of concerns. The mean concern severity was M (SD) = 6.47 (2.22) at baseline, dropping to M (SD) = 2.90 (2.15) post intervention. Only three individuals (<1%) showed increase in severity of concern post intervention. Mean concern severity was independent of the number of concerns (Spearman’s ρ=.076, p=.17). In the EQ-5D utility score change model, the strongest predictor was Mean concern change (β=-0.34), meaning that a one standard deviation (1SD) decrease in concern severity at follow-up corresponded to a 0.34SD increase in utility score. Next strongest predictor was Palliative care, which contributed to a reduction of -.012 to the raw EQ-5D utility score change when present (because of binary coding the β coefficient isn't easily interpretable). Finally, when the number of concerns increased by 1SD, the utility score increased by 0.13SD. The time elapsed between EQ-5D assessments was not a significant predictor in the model.
In the VAS model, the strongest predictor was Palliative care, which contributed approximately -8 points on the VAS scale, followed by Mean concern change, where a 1SD decrease in concerns corresponded to a 0.17SD increase in VAS. Time elapsed between assessments was a significant predictor of VAS change in the model, corresponding to a 0.16SD increase in VAS in a 1SD time increase.
|
EQ5D-3L Utility value change
|
EQ5D VAS change
|
Predictors
|
Estimates
|
std. Beta
|
CI
|
standardized CI
|
p
|
Estimates
|
std. Beta
|
CI
|
standardized CI
|
p
|
Intercept
|
-0.109
|
|
-0.195 – -0.022
|
|
0.014
|
0.459
|
|
-3.370 – 4.287
|
|
0.814
|
Time elapsed (30 days)
|
0.012
|
0.102
|
-0.007 – 0.030
|
-0.011 – 0.216
|
0.207
|
1.076
|
0.157
|
0.122 – 2.030
|
0.040 – 0.274
|
0.027
|
Mean concern change
|
-0.04
|
-0.343
|
-0.055 – -0.024
|
-0.456 – -0.230
|
<0.001
|
-1.132
|
-0.166
|
-2.155 – -0.109
|
-0.284 – -0.048
|
0.03
|
Number of concerns
|
0.016
|
0.129
|
0.001 – 0.032
|
0.014 – 0.244
|
0.036
|
|
|
|
|
|
Palliative care (at either assessment)
|
-0.12
|
-0.168
|
-0.206 – -0.033
|
-0.283 – -0.052
|
0.007
|
-8.636
|
-0.206
|
-14.178 – -3.095
|
-0.322 – -0.090
|
0.002
|
Observations
|
276
|
276
|
R2 / R2 adjusted
|
0.170 / 0.158
|
0.087 / 0.077
|
Table 4. Linear multivariate regression with White’s variance estimator for Utility score change and VAS change at follow-up.