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. Author manuscript; available in PMC: 2013 Jul 29.
Published in final edited form as: Lancet Neurol. 2009 Jul 29;8(9):791–801. doi: 10.1016/S1474-4422(09)70170-X

Table 1.

Demographics of the TRACK-HD participants at baseline

Controls (n=123) PreHD HD
PreHD-A (n=62) PreHD-B (n=58) Combined (n=120) HD1 (n=77) HD2 (n=46) Combined (n=123)
Age (years) 46·1 (10·2, 23·0–65·7)   41·1 (8·6, 18·6–59·4)   40·6 (9·2, 22·3–64·1)   40·8 (8·9, 18·6–64·1)   47·2 (10·3, 22·8–64·1)   51·4 (8·6, 33·3–63·3)   48·8 (9·9, 22·8–64·1)
Women 68 (55%)   33 (53%)   33 (57%)   66 (55%)   46 (60%)   21 (46%)   67 (55%)
Education (years)   4·0 (1·3)     4·1 (1·1)     3·8 (1·3)     3·9 (1·2)     3·8 (1·3)     3·2 (1·4)     3·6 (1·3)
Disease-burden score*   ·· 259·1 (30·1) 333·1 (30·0) 294·8 (47·7) 364·1 (74·3) 397·6 (67·5) 376·6 (73·3)
Centres
    Leiden 30   16   14   30   16   14   30
    London 30   14   16   30   19   11   30
    Paris 30   14   16   30   26     4   30
    Vancouver 33   18   12   30   16   17   33

Data are mean (SD, range) or number (%).

*

Disease-burden score=age×(CAG length−35·5).