Table 5.

Number of Site-specific Cancer Cases, Age- and Time-adjusted Proportional Incidence Ratio, and 95% Confidence Intervals for Female Cosmetology Workers Licensed as a Cosmetologist or Manicurist in California, 1988–2005

Cancer Sites	SEER Codes	All Licenseesa			Cosmetologists			Manicurists
		No. of Cases	PIRb,c	95% CId	No. of Cases	PIRb,c	95% CId	No. of Cases	PIRb,c	95% CId
Bladder	29010	63	1.11	0.85, 1.40	43	1.13	0.82, 1.49	20	1.07	0.65, 1.59
Brain	31010	115	0.92	0.76, 1.10	74	0.86	0.68, 1.07	41	1.06	0.76, 1.41
Breast	26000	3,455	0.99	0.96, 1.02	2,435	1.00	0.96, 1.04	1,020	0.96	0.90, 1.02
Leukemia	35011–35043	168	1.05	0.90, 1.21	128	1.17	0.98, 1.38	40	0.79	0.57, 1.06
Lung	22030	777	1.08	1.00, 1.15	496	1.02	0.93, 1.11	281	1.21	1.07, 1.36
Melanoma of the skin	25010	477	1.00	0.91, 1.09	321	0.98	0.87, 1.09	156	1.07	0.91, 1.24
Multiple myeloma	34000	83	1.24	0.99, 1.53	59	1.29	0.96, 1.65	24	1.14	0.73, 1.64
Non-Hodgkin's lymphoma	33041–33042	328	1.09	0.97, 1.21	220	1.06	0.93, 1.21	108	1.15	0.94, 1.37
Ovary	27040	333	0.96	0.86, 1.07	239	1.00	0.87, 1.13	94	0.88	0.71, 1.06
Stomach	21020	113	1.07	0.88, 1.28	82	1.14	0.90, 1.40	31	0.93	0.63, 1.29
Thyroid	32010	503	1.13	1.04, 1.23	350	1.14	1.03, 1.27	153	1.13	0.95, 1.31
Uterus	27020–27030	459	0.88	0.81, 0.97	308	0.86	0.77, 0.96	151	0.94	0.80, 1.10

Abbreviations: CI, confidence interval; PIR, proportional incidence ratio; SEER, Surveillance, Epidemiology, and End Results.

^aIncludes both licensed cosmetologists and manicurists.

^bPIR values were calculated from Ulm (1990) (22).

^cPIR adjusted for age (5-year categories) and time period (1988–1994, 1995–1999, and 2000–2005).

^dCalculated from van der Gulden and Verbeek (23).