Risk factors for thoracic-osteoporotic thoracic vertebral compression fractures during the normalized prevention and control period of COVID-19

Table 4 Comparison of influencing factors of nucleic acid test results, n (%)

Item	Negative subgroup (n = 145)	Positive subgroup (n = 85)	χ2	P value
Fracture location
Thoracolumbar segment (T11-L2)	108 (74.5)	11 (12.9)	81.279	< 0.001a
Lumbar segment (L3-L5)	17 (11.7)	6 (7.1)	1.295	0.255
Thoracic segment (T1-T10)	20 (13.8)	68 (80.0)	99.437	< 0.001a
Cause of fracture
Fall at the same level	58 (40.90)	10 (28.24)	20.515	< 0.001a
Fall from height	30 (22.76)	0 (11.76)	20.224	< 0.001a
Sprain	21 (14.48)	1 (9.41)	10.968	0.0009a
Lifting heavy objects	14 (10.66)	1 (9.41)	6.149	0.0131a
Cough	2 (6.21)	73 (41.18)	174.127	< 0.001a

^aP < 0.05 vs the negative subgroup.

T: Thoracic vertebrae; L: Lumbar vertebrae.