Characterizing posterior calcaneal spur fractures in insertional Achilles tendinopathy: A case control study

Table 2 Comparison of demographics between cases with and without spur fractures, mean ± SD (median, range)

Parameter	With spur fracture	Without spur fracture	P value
Total number (female, male)	87 (11, 76)	140 (48, 92)	< 0.001c
Age (years)	51.0 ± 10.5 (50, 32-87)	55.7 ± 12.5 (55, 26-81)	0.004
Height (cm)	171.5 ± 7.5 (172.2, 150-189.2)	166.0 ± 8.7 (168, 146.5-185.3)	< 0.001c
Weight (kg)	80.0 ± 14.5 (78.5, 39.5-147.5)	75.3 ± 16.3 (72.2, 43.5-123.8)	0.016
Body mass index	27.1 ± 4.2 (26.1, 16.4-41.2)	27.4 ± 5.6 (25.8, 19.3-43.7)	0.56
Side (left, right)	87 (39, 48)	140 (68, 72)	0.59
Spur length (mm)	12.3 ± 4.5 (11, 3-24)	5.7± 3.0 (5.5, 1-19)	< 0.001c

^cP < 0.001.

Categorical and continuous variables were analyzed using Fisher’s exact test and the Mann-Whitney U test, respectively. P values were compared against the Bonferroni-adjusted significance threshold of P < 0.002.