Table 2.
Rasch-based crosswalk for transforming PF-10 scores into HAQ-DI scores and vice versa
|
HAQ standard scoring (with aids and devices) |
HAQ alternative scoring (without aids and devices) |
||||||
|---|---|---|---|---|---|---|---|
|
Observed |
Predicted |
Observed |
Predicted |
Observed |
Predicted |
Observed |
Predicted |
|
HAQ-SDI |
PF-10 |
PF-10 |
HAQ-SDI |
HAQ-ADI |
PF-10 |
PF-10 |
HAQ-ADI |
| score | score* | score* | score | score | score* | score* | score |
| 0.000 |
95 (54.9) |
100 (57.0) |
0.000 |
0.000 |
95 (54.9) |
100 (57.0) |
0.000 |
| 0.125 |
90 (52.8) |
95 (54.9) |
0.000 |
0.125 |
85 (50.7) |
95 (54.9) |
0.000 |
| 0.250 |
85 (50.7) |
90 (52.8) |
0.125 |
0.250 |
80 (48.6) |
90 (52.8) |
0.125 |
| 0.375 |
75 (46.5) |
85 (50.7) |
0.250 |
0.375 |
75 (46.5) |
85 (50.7) |
0.125 |
| 0.500 |
75 (46.5) |
80 (48.6) |
0.250 |
0.500 |
70 (44.4) |
80 (48.6) |
0.250 |
| 0.625 |
70 (44.4) |
75 (46.5) |
0.375 |
0.625 |
65 (42.3) |
75 (46.5) |
0.375 |
| 0.750 |
65 (42.3) |
70 (44.4) |
0.625 |
0.750 |
55 (38.1) |
70 (44.4) |
0.500 |
| 0.875 |
60 (40.2) |
65 (42.3) |
0.750 |
0.875 |
50 (36.0) |
65 (42.3) |
0.625 |
| 1.000 |
55 (38.1) |
60 (40.2) |
0.875 |
1.000 |
45 (33.9) |
60 (40.2) |
0.625 |
| 1.125 |
50 (36.0) |
55 (38.1) |
1.000 |
1.125 |
45 (33.9) |
55 (38.1) |
0.750 |
| 1.250 |
45 (33.9) |
50 (36.0) |
1.125 |
1.250 |
40 (31.8) |
50 (36.0) |
1.000 |
| 1.375 |
45 (33.9) |
45 (33.9) |
1.375 |
1.375 |
35 (29.7) |
45 (33.9) |
1.125 |
| 1.500 |
40 (31.8) |
40 (31.8) |
1.500 |
1.500 |
30 (27.6) |
40 (31.8) |
1.250 |
| 1.625 |
35 (29.7) |
35 (29.7) |
1.625 |
1.625 |
25 (25.5) |
35 (29.7) |
1.375 |
| 1.750 |
30 (27.6) |
30 (27.6) |
1.750 |
1.750 |
25 (25.5) |
30 (27.6) |
1.500 |
| 1.875 |
25 (25.5) |
25 (25.5) |
1.875 |
1.875 |
25 (25.5) |
25 (25.5) |
1.750 |
| 2.000 |
20 (23.4) |
20 (23.4) |
2.125 |
2.000 |
20 (23.4) |
20 (23.4) |
2.000 |
| 2.125 |
20 (23.4) |
15 (21.3) |
2.250 |
2.125 |
15 (21.3) |
15 (21.3) |
2.125 |
| 2.250 |
15 (21.3) |
10 (19.2) |
2.375 |
2.250 |
10 (19.2) |
10 (19.2) |
2.250 |
| 2.375 |
10 (19.2) |
5 (17.0) |
2.625 |
2.375 |
10 (19.2) |
5 (17.0) |
2.625 |
| 2.500 |
5 (17.0) |
0 (14.9) |
2.750 |
2.500 |
5 (17.0) |
0 (14.9) |
2.750 |
| 2.625 |
5 (17.0) |
|
|
2.625 |
5 (17.0) |
|
|
| 2.750 |
0 (14.9) |
|
|
2.750 |
0 (14.9) |
|
|
| 2.875 |
0 (14.9) |
|
|
2.875 |
0 (14.9) |
|
|
| 3.000 | 0 (14.9) | 3.000 | 0 (14.9) | ||||
*Scores are original 0–100 transformed scale scores, 1998 US norm-based T-scores are presented between brackets.