Association between C-reactive protein and radiotherapy-related pain in a tri-racial/ethnic population of breast cancer patients: a prospective cohort study

Table 5 Association between pre-RT CRP and RT-related pain by obesity

BMI	Pre-RT CRP	N	%	RT-related pain		Univariable		Multivariable¹
BMI	Pre-RT CRP	N	%	N	%	OR (95%CI)	P	OR (95%CI)	P
< 30	NA	161	64	31	54	Ref		Ref
≥ 30	NA	90	36	26	46	1.70 (0.93, 3.11)	0.082	1.49 (0.80, 2.78)	0.211
NA	< 10 mg/L	225	90	47	82	Ref		Ref
NA	≥ 10 mg/L	26	10	10	18	2.37 (1.01, 5.55)	0.048	2.44 (1.02, 5.85)	0.046
< 30	< 10 mg/L	148	92	28	90	Ref		Ref
< 30	≥ 10 mg/L	13	8	3	10	1.29 (0.33, 4.98)	0.716	1.36 (0.35, 5.39)	0.659
≥ 30	< 10 mg/L	77	86	19	73	Ref		Ref
≥ 30	≥ 10 mg/L	13	14	7	27	3.56 (1.07, 11.91)	0.039	3.71 (1.05, 13.09)	0.041
< 30	< 10 mg/L	148	59	28	49	Ref		Ref
< 30	≥ 10 mg/L	13	5	3	5	1.29 (0.33, 4.98)	0.716	1.34 (0.34, 5.26)	0.678
≥ 30	< 10 mg/L	77	31	19	33	1.40 (0.73, 2.72)	0.315	1.22 (0.62, 2.42)	0.567
≥ 30	≥ 10 mg/L	13	5	7	12	5.00 (1.56, 16.03)	0.007	4.73 (1.41, 15.81)	0.012

¹All models were adjusted for age (< 50, ≥ 50) and race/ethnicity (NHW, HW, AA). Significant findings are in italics