Table 1.

Baseline statistics.

	Knee OA patients (n = 101)	Controls (n = 62)	P Value
Age (yr)	66.2 ± 5.3	64.5 ± 6.	0.216
Gender (F/M)	60/41	40/22	0.317
BMI (kg/m2)	24.2 ± 2.1	23.8 ± 2.0	0.141
K-L grade (2/3/4)	33/37/31	/
NPS	5.3 ± 1.9	/
OKS	21.5 ± 7.9	/
AKS knee score	55.2 ± 8.2	/
AKS function score	49.1 ± 7.9	/
Serum PACAP levels (pg/mL)	93.2 ± 12.5	94.9 ± 15.5	0.477
SF PACAP levels (pg/mL)	239.5 ± 36.4	305.1 ± 41.2	< 0.001

Basic indices and PACAP levels are given as the mean value ± SD.