Table A3.

Raw Score to T Score Conversion Table (IRT Fixed-Parameter Calibration Linking) for BDI-II to PROMIS Depression

BDI-II score	PROMIS Depression T score	SE	BDI-II score	PROMIS Depression T score	SE
0	34.9	5.8	32	65.8	1.9
1	39.4	4.6	33	66.4	1.9
2	42.3	4.0	34	66.9	1.9
3	44.4	3.6	35	67.4	1.8
4	46.2	3.2	36	67.9	1.8
5	47.6	2.9	37	68.4	1.8
6	48.9	2.7	38	68.9	1.8
7	50.0	2.5	39	69.4	1.8
8	51.0	2.4	40	69.9	1.8
9	51.9	2.3	41	70.4	1.8
10	52.7	2.2	42	70.9	1.8
11	53.5	2.1	43	71.4	1.8
12	54.2	2.1	44	71.9	1.8
13	54.9	2.0	45	72.4	1.9
14	55.6	2.0	46	72.9	1.9
15	56.3	2.0	47	73.5	1.9
16	56.9	2.0	48	74.0	1.9
17	57.5	2.0	49	74.6	1.9
18	58.2	2.0	50	75.2	1.9
19	58.8	1.9	51	75.7	2.0
20	59.3	1.9	52	76.4	2.0
21	59.9	1.9	53	77.0	2.0
22	60.5	1.9	54	77.7	2.1
23	61.1	1.9	55	78.4	2.2
24	61.6	1.9	56	79.1	2.2
25	62.2	1.9	57	79.9	2.3
26	62.7	1.9	58	80.8	2.4
27	63.2	1.9	59	81.8	2.5
28	63.8	1.9	60	82.9	2.6
29	64.3	1.9	61	84.0	2.6
30	64.8	1.9	62	85.1	2.6
31	65.3	1.9	63	86.3	2.4

Note. IRT = item response theory; BDI-II = Beck Depression Inventory–II; PROMIS Depression = Depression subscale of the Patient-Reported Outcomes Measurement Information System.