. 2011 Jan;258(1):192–198. doi: 10.1148/radiol.10100426

Table 3.

Frequency of Cervical- and Lumbar-predominant Involvement according to Sex

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Note.—Data are numbers of patients, with percentages in parentheses. This analysis was limited to patients with AS for 20 or more years. P = .56 for the comparison of lumbar, equal, and cervical disease predominance between men and women; P = .88 for the comparison of isolated cervical involvement between men and women.

Isolated cervical involvement was defined as a cervical spine score of 3 or greater along with a lumbar spine score of 0 or 1.