Table 2:

Symptom duration of the SIH cohort^{^a}

	Present	Absent	P Value
Overall hyperostosis^{^b}	n = 64 36 months (12–78)	n = 102 22 months (8–49)	.171
Diffuse hyperostosis	n = 11 36 months (7–80)	n = 155 25 months (9–64)	.798
Layered hyperostosis	n = 53 36 months(12–77)	n = 113 22 months(8–51)	.197

↵a Numbers in parentheses are interquartile range (25^th and 75^th percentiles) of symptom duration in months.
↵b Diffuse and layered.