TABLE 2.

Average pain at study enrollment by disease state at enrollment and self-reported race (N = 4 pain scales)

	CRPC			mHSPC
	White (N = 241)	Black (N = 65)	P-value	White (N = 463)	Black (N = 110)	P-value
EORTC QLQ-C30 Pain Scale (0–100)a  Minimally important difference: 5 points
Mean (SD)	18.4 (23.1)	26.2 (28.1)	0.05	19.1 (25.0)	26.7 (30.0)	0.03
Missing	n = 33	n = 4		n = 67	n = 19
Q1: How often have you had pain in the past week?
1 – Not at all	108 (51%)	23 (38%)	0.13	200 (51%)	38 (41%)	0.09
2 – A little	77 (37%)	25 (41%)		138 (35%)	33 (36%)
3 – Quite a bit	18 (9%)	8 (13%)		42 (11%)	12 (13%)
4 – Very much	7 (3%)	5 (8%)		16 (4%)	9 (10%)
Missing	n = 31	n = 4		n = 67	n = 18
Q2: How often did pain interfere with your daily activities in the past week?
1 – Not at all	132 (63%)	34 (56%)	0.26	265 (67%)	53 (58%)	0.11
2 – A little	58 (28%)	17 (28%)		96 (24%)	22 (24%)
3 – Quite a bit	15 (7%)	7 (11%)		20 (5%)	8 (9%)
4 – Very much	3 (1%)	3 (5%)		16 (4%)	8 (9%)
Missing	n = 33	n = 4		n = 66	n = 19
Brief Pain Inventory (BPI)  Minimally important difference: 1.3–1.6 points
Rate your average pain (1–10)
Mean (SD)	2.2 (1.6)	3.1 (2.2)	0.01	2.2 (1.6)	3.2 (2.4)	<0.001
Missing	n = 42	n = 10		n = 73	n = 19
Rate your pain at its worst in the last 24 hours (1–10)
4 or greater	48 (24%)	18 (33%)	0.27	85 (22%)	37 (41%)	<0.001
Less than 4	151 (76%)	37 (67%)		305 (78%)	54 (59%)
Missing	n = 42	n = 10		n = 73	n = 19
FACT-FPSI  Minimally important difference: Not established
How often have you had bone pain in the past week?
0 – Not at all	120 (60%)	31 (55%)	0.90	234 (61%)	49 (55%)	0.27
1 – A little bit	42 (21%)	14 (25%)		86 (22%)	21 (24%)
2 – Somewhat	21 (11%)	6 (11%)		27 (7%)	5 (6%)
3 – Quite a bit	10 (5%)	4 (7%)		31 (8%)	9 (10%)
4 – Very much	6 (3%)	1 (2%)		7 (2%)	5 (6%)
Missing	n = 42	n = 9		n = 78	n = 21

Abbreviations: CRPC, castration-resistant prostate cancer; mHSPC, metastatic hormone-sensitive prostate cancer.

^aThe EORTC pain scale score is created through a linear transformation of Q1 and Q2 below.