Table 2. New cancer in 6401 patients with squamous cell carcinoma of the skin in Northern Ireland: 1993–2002 (all ages).

		Cancer in men		Cancer in women		Cancer in men and women
Site	ICD 10	n	SIR (95% CI)	n	SIR (95% CI)	n	SIR (95% CI)
All	C00–C97	549	1.58 (1.44, 1.71)*	307	1.55 (1.38, 1.73)*	856	1.57 (1.46, 1.67)*
All excluding non-melanoma skin cancer	C00–C97 ex C44	352	1.34 (1.20, 1.48)*	174	1.21 (1.03, 1.39)*	526	1.29 (1.18, 1.40)*
Skin, melanoma	C43	12	3.13 (1.36, 4.91)*	3	0.86 (−0.11, 1.82)	15	2.04 (1.01, 3.08)*
Skin, basal cell	C44	197	1.97 (1.69, 2.25)*	133	2.19 (1.81, 2.56)*	330	2.05 (1.83, 2.27)*
Lung	C33, C34	47	0.94 (0.67, 1.21)	23	1.40 (0.83, 1.98)	70	1.05 (0.81, 1.30)
Breast (female only)	C50			17	0.58 (0.30, 0.86)
Cervix	C53			4	2.89 (0.06, 5.72)
Uterus	C54			4	0.92 (0.02, 1.81)
Ovary	C56			3	0.52 (−0.07, 1.11)
Prostate	C61	58	1.01 (0.75, 1.27)
Oesophagus and stomach	C15, C16	32	1.48 (0.97, 2.00)	12	1.16 (0.50, 1.81)	44	1.38 (0.97, 1.78)
Oesophagus	C15	13	1.76 (0.80, 2.72)	6	1.52 (0.30, 2.73)	19	1.68 (0.92, 2.43)
Stomach	C16	19	1.34 (0.74, 1.94)	6	0.94 (0.19, 1.68)	25	1.21 (0.74, 1.69)
Colorectal	C18–C21	49	1.13 (0.81, 1.44)	23	0.93 (0.55, 1.32)	72	1.06 (0.81, 1.30)
Colon	C18	31	1.09 (0.71, 1.48)	15	0.87 (0.43, 1.32)	46	1.01 (0.72, 1.30)
Rectum	C19–C21	18	1.19 (0.64, 1.74)	8	1.07 (0.33, 1.82)	26	1.15 (0.71, 1.60)
Haematological malignancies	C81–C96	26	1.25 (0.77, 1.73)	16	1.37 (0.70, 2.04)	42	1.29 (0.90, 1.69)
Non-Hodgkin's lymphoma	C82–C85	9	1.14 (0.39, 1.88)	8	1.45 (0.44, 2.45)	17	1.26 (0.66, 1.87)
Tobacco-related cancers	C00–C14, C15, C16, C22, C25, C32, C33, C34, C53, C64–C66, C67, C68, C92	139	1.21 (1.01, 1.41)*	67	1.49 (1.13, 1.85)*	206	1.29 (1.11, 1.46)*

CI=confidence interval; SIR=standardised incidence ratio. Bold values indicate ^*P<0.05.