Table 2.

Sample-based prevalence of disc space narrowing (DSN), vertebral osteophytes (OST) and facet joint osteoarthritis (FOA) stratified by gender, race and age.

	DSN		OST		FOA
	n (%)		n (%)		n (%)
All participants   n=840	484 (57.6)		740 (88.1)		486 (57.9)
Age Category
45-54	86 (36.1)		188 (79.3)		92 (38.5)
55-64	153 (54.8)		247 (88.5)		146 (52.3)
65-74	151 (73.3)		193 (93.2)		149 (72.3)
75+	94 (80.3)		112 (95.7)		99 (85.3)
Cross Tabulation
DSN	N/A		458 (54.5)		327 (38.9)
OST	N/A		N/A		452 (53.8)
DSN & OST	N/A		N/A		313 (37.3)
Women n=523	314 (60.4)	0.068*	462 (88.0)	0.912*	323 (61.6)	0.004*
Age Category
45-54†	48 (38.4)		104 (83.2)		59 (46.8)
55-64	101 (54.0)		163 (86.7)		101 (53.7)
65-74	97 (75.8)		117 (90.7)		92 (71.9)
75+	68 (81.9)		78 (94.0)		71 (86.6)
Men n=317	170 (53.6)		278 (88.3)		163 (51.6)
Age Category
45-54	38 (33.6)		84 (75.0)		33 (29.2)
55-64	52 (56.5)		84 (92.3)		45 (49.5)
65-74	54 (69.2)		76 (97.4)		57 (73.1)
75+	26 (76.5)		34 (100.0)		28 (82.4)
AAs n=316	165 (52.2)	0.014*	267 (84.5)	0.012*	142 (44.7)	<0.001*
Age Category
45-54	33 (30.6)		80 (74.1)		26 (23.9)
55-64	61 (52.6)		102 (87.9)		51 (43.6)
65-74	44 (68.8)		59 (92.1)		44 (68.8)
75+	27 (96.4)		26 (92.9)		21 (75.0)
Caucasians n=524	319 (60.9)		473 (90.3)		344 (65.9)
Age Category
45-54	53 (40.8)		108 (83.7)		66 (50.8)
55-64	92 (56.4)		145 (89.0)		95 (58.6)
65-74	107 (75.4)		134 (93.7)		105 (73.9)
75+	67 (75.3)		86 (96.6)		78 (88.6)

Disc space narrowing and vertebral osteophytes coded as mild or greater and facet joint osteoarthritis coded as absent or present.

^*p-value for difference in gender or race for each outcome.

^†Women <50 years old excluded (n=132). N/A= not applicable