Table 2. Invasive squamous cell carcinoma of skin: age-standardised incidence rates by sex, deprivation quintile and calendar period of diagnosis.

Squamous cell carcinoma (ICD-10 C44, ICD-O-2 807)
Sex	1978–80	2002–04	P-value for trend over time
Males
Number of cases	1049	3324	<0.001
ASR – least deprived	15.4	42.2
ASR – most deprived	14.7	31.5
Ratio quintiles 1 : 5	1.0	1.3
Females
Number of cases	696	2224	<0.001
ASR – least deprived	6.7	15.5
ASR – most deprived	6.7	12.0
Ratio quintiles 1 : 5	1.0	1.3

Abbreviations: ASR=age-standardised incidence rates; ICD=International Classification of Diseases.