TABLE 3.

Mean pressure under the first MTH and big toe, k-means clustering.

HK 1st MTP joint		Yes	No
		n = 28	n = 72
Pressure 1st MTH	Pre	417.2 ± 254.5	359.6 ± 185.1
	Post	409.8 ± 280.4	346.3 ± 124.3
HK big toe IPJ		Yes	No
		n = 62	n = 38
Pressure big toe	Pre	369.5 ± 108.7	261.6 ± 86.1
	Post	216.1 ± 25.3	156.7 ± 20.7

HK, hyperkeratosis; MTH, metatarsal head; Pre, pre-surgery; Post, post-surgery; IPJ, interphalangeal joint.