Articular and periarticular spinal calcifications in relation to synovial fluid findings in patients with calcium pyrophosphate dihydrate deposition disease (CPPD)

Egyptian Rheumatology and Rehabilitation

Table 2 Relation between the presence of spinal calcification and the presence of calcifications characteristic of CPPD deposition in the knee and wrist joints detected by conventional radiography and MSUS in the studied patients

	Calcification		Spinal calcification		χ²	p
	Calcification		Present n (%)	Absent n (%)	χ²	p
Plain X-ray	Knee	Present	20 (37)	18 (40)	0.091	0.763
	Knee	Absent	35 (63)	27 (60)	0.091	0.763
	Wrist	Present	13 (24.1)	3 (6.7)	5.489	0.019
	Wrist	Absent	42 (75.9)	42 (93.3)	5.489	0.019
MSUS	Knee	Present	51 (92.6)	42 (93.3)	0.002	0.866
	Knee	Absent	4 (7.4)	3 (6.7)	0.002	0.866
	Wrist	Present	18 (31.5)	9 (20)	1.671	0.196
	Wrist	Absent	37 (68.5)	36 (80)	1.671	0.196

There was significant positive association between spinal calcification and wrist joint calcifications detected by conventional radiography