Table 2. The correlation coefficient between serum CRP, NGF and cytokines/chemokines and age or gender in IC/BPS and control group.

Patients	Factor		CRP	NGF	IL-1β	IL-6	TNF-α	IL-8
Control	age	R	0.53	−0.06	0.22	0.06	0.50	0.12
		p value	0.01	0.76	0.28	0.76	0.01	0.56
	gender	R	0.22	0.17	0.22	0.08	0.07	0.35
		p value	0.27	0.38	0.24	0.68	0.70	0.06
IC/BPS	age	R	0.22	0.17	0.22	0.08	0.07	0.35
		p value	0.27	0.38	0.24	0.68	0.70	0.06
	gender	R	−0.11	0.05	−0.23	−0.10	−0.03	−0.09
		p value	0.5	0.78	0.23	0.59	0.89	0.62

CRP: C-reactive protein, NGF: nerve growth factor, IL: interleukin, TNF-α: tumor necrosis factor-α, IC/BPS: interstitial cystitis/bladder pain syndrome. R: correlation coefficient.