Single nucleotide polymorphisms in the CD40 gene associate with the disease susceptibility and severity in knee osteoarthritis in the Chinese Han population: a case-control study

Table 1 Comparisons of baseline characteristics between the KOA group and the control group

Baseline characteristic	KOA group	Control group	P
Baseline characteristic	(n = 133)	(n = 143)	P
Age (year)	58.24 ± 9.66	56.72 ± 9.43	0.187
Gender (case)			0.214
Male	39	52
Female	94	91
BMI (kg/m²)	23.60 ± 3.07	22.95 ± 2.82	0.068
Smoking status (%)
Never	100 (75.19)	102 (71.33)	0.577
Ever	8 (6.02)	7 (4.90)
Still	25 (18.8)	34 (23.78)
Alcohol consumption (%)
Yes	48 (36.09)	48 (33.57)	0.660
No	85 (63.91)	95 (66.43)
Heavy labor (%)	37 (27.82)	39 (27.27)	0.919
Living environment			<0.001
Good (Bright + dry)	14 (10.53)	133 (93.01)
Poor (Dark + damp)	119 (89.47)	10 (6.99)

ISSN: 1471-2474