Table 4.
Consistency of performance scores between outcome measurements
| Consistency (z-differences; classified within/between tertiles) | CROM-FTF performance score (t2 + Δ) normalized with SD [z] | Performance score ± SD [t2z + Δz, t2D] | Diff. t2D (CROM − PROM) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| High consistency (%) | Moderate consistency (%) | Discrepant (%) | Mean | SD | |||||
| CROM-FTF t2 + Δ | 100.0 | 0.0 | 0.0 | −0.50 | ± | 0.93 | 0.00 | ± | 0.00 |
| Changes FTF (t2 – t1) | 61.3 | 36.5 | 2.3 | NaN | ± | NaN | NaN | ± | NaN |
| Random variable t2 + Δ (0 ± √5) no consistency | 33.3 | 33.3 | 33.3 | 0.00 | ± | 2.24 | 0.00 | ± | 3.16 |
| EQ5D health (EQ-VAS) t2 + Δ | 59.2 | 27.3 | 13.4 | −0.40 | ± | 1.93 | −0.11 | ± | 2.10 |
| EQ5D TTO t2 + Δ | 72.9 | 22.3 | 4.8 | −0.50 | ± | 1.45 | 0.00 | ± | 1.55 |
| NPRS t2 + Δ | 57.5 | 34.7 | 7.8 | −0.78 | ± | 1.56 | 0.27 | ± | 1.70 |
| HAQ t2 + Δ | 76.7 | 18.2 | 5.1 | −0.22 | ± | 1.34 | −0.29 | ± | 1.39 |
| ODI t2 + Δ | 71.4 | 24.8 | 3.8 | −0.51 | ± | 1.32 | 0.00 | ± | 1.40 |
| Mean PROMs t2 + Δ | 68.9 | 27.3 | 3.8 | −0.62 | ± | 1.34 | 0.11 | ± | 1.42 |
CROM-FTF, mean of PROMs and the overall medical outcome (MQO; mean of PROMs and CROM-FTF) are highlighted in bold
Consistency. In most cases (68.9%), the results in CROM-FTF and PROMs point in the same direction (high consistency). Specifically, 27.3% of results in PROM scores showed a moderate agreement in performance with CROM-FTF (moderate consistency). In 3.8% of the cases, the results between CROM-FTF vs PROMs were contrary to each other (discrepant)
Consistency of performance (t2 + Δ; Differences of t2D/√10) using normal scores in three categories: (high consistency = t2D within one/same tertile. moderate consistency = between one and two tertiles. discrepant = more than two tertiles difference in normalized performance scores); n = 395