Table 2.

Risk of plasma cell neoplasms according to demographic characteristics and transplanted organ

Characteristic	N	Incidence*	SIR	95% lower limit	95% upper limit	P-value for heterogeneity in SIRs
Sex						0.25
Female	36	9.9	1.55	1.09	2.15
Male	104	18.9	1.90	1.55	2.30
Age at transplant, years						0.03
0–34	7	3.0	8.19	3.29	16.87
35–49	30	9.8	2.36	1.59	3.37
50–64	79	25.4	1.69	1.33	2.10
65+	24	40.6	1.37	0.88	2.04
Race/ethnicity						0.04
White	97	16.4	2.01	1.63	2.45
Black	23	17.2	1.25	0.79	1.88
Hispanic	13	9.6	1.43	0.76	2.45
Asian/Pacific Islander	7	14.0	3.19	1.28	6.57
Transplanted organ						0.25
Kidney	82	15.6	1.88	1.50	2.34
Liver	22	10.9	1.29	0.81	1.96
Heart	30	27.2	2.27	1.53	3.25
Lung	2	7.2	0.86	0.10	3.09
Other	4	8.4	2.26	0.61	5.77
HLA mismatch†						0.26
0–2	28	15.2	2.10	1.39	3.03
3–4	44	13.2	1.51	1.10	2.03
5–6	51	18.8	2.03	1.51	2.67

Notes

Abbreviations: SIR standardized incidence ratio

^*Incidence rate is per 100,000 person-years.

^† Subjects with missing data on HLA mismatch were excluded from this analysis.