First description of seasonality of birth and diagnosis amongst teenagers and young adults with cancer aged 15–24 years in England, 1996–2005

Table 2 Sex-adjusted monthly seasonality of diagnosis in cancer amongst 15–24 year olds in England, 1996–2005

	Harmonic model results²
Diagnostic group¹	Cases ( N)	Max	Min	P-value³	GOF ( P-value)	Period (Months)
Leukaemia	1299	Oct	Apr	0.266	0.461	12
ALL	591	Oct	Apr	0.253	0.780	12
AML	463	Nov	May	0.498	0.354	12
CML	147	Jan, Jul	Apr, Oct	0.651	0.690	6
Other Leukaemia	98	Feb, Aug	May, Nov	0.424	0.528	6
Lymphoma	3070	Feb	Aug	0.008	0.716	12
Hodgkin Lymphoma	2079	Feb	Aug	<0.001	0.580	12
Non-Hodgkin Lymphoma	991	Feb	Aug	0.667	0.968	12
CNS Tumours	1882	Sep	Mar	0.653	0.638	12
Astrocytoma	629	Dec, Jun	Mar, Sep	0.479	0.730	6
Other Gliomas	195	Sep	Mar	0.091	0.942	12
Ependymoma	99	Jan	Jul	0.612	0.988	12
Medulloblastoma	111	Dec, Jun	Mar, Sep	0.080	0.640	6
Other CNS	702	Dec, Jun	Mar, Sep	0.010	0.305	6
Unspecified CNS	146	May, Nov	Feb, Aug	0.448	0.657	6
Leukaemia, Lymphoma, CNS tumours	6251	Jan	Jul	0.241	0.793	12

¹ Based on the classification scheme for tumours diagnosed in adolescents and young adults [12].
²Best fitting model is presented in each case, based on comparison of Akaike’s Information Criterion between models with differing periods.
³Statistical significance of the peaks.
GOF: Goodness of fit statistic.

ISSN: 1471-2407