Increasing Incidence, but Lack of Seasonality, of Elevated TSH Levels, on Newborn Screening, in the North of England

Table 2

Annual number of cases and incidence of elevated TSH levels on newborn screening in the Northern Region of England, 1994–2005.

Year	Number of cases	Incidence per $\mathrm{100,000}$ live births
1994	15	37.12
1995	11	32.26
1996	13	38.61
1997	5	15.21
1998	16	49.99
1999	20	64.65
2000	15	50.63
2001	22	76.11
2002	26	89.02
2003	28	92.84
2004	22	70.93
2005	20	63.64