Table 1.

Clinical data of AS patients in different groups

	PDQ ≤ 12 (n = 113)	12 < PDQ < 19 (n = 55)	PDQ ≥ 19 (n = 14)	P value
Sex (M/F)	102/11	53/2	8/6	0.6872
Age (years)	36.96 ± 11.60	36.36 ± 8.88	37.43 ± 10.78	0.9228
Duration	10.94 ± 8.87	8.67 ± 6.07	14.36 ± 9.24	0.0458*
NSARDs	95/113	54/55	14/14	0.7703
NP	2.25 ± 2.85	5.34 ± 4.55	5.87 ± 3.02	< 0.0001****
TBP	2.23 ± 2.62	5.54 ± 4.92	5.85 ± 2.48	< 0.0001****
PP	1.25 ± 1.79	2.44 ± 2.40	4.54 ± 2.54	< 0.0001****
CRP	12.75 ± 18.12	14.41 ± 11.79	16.77 ± 11.36	0.6057
ASDAS-CRP	1.29 ± 0.76	2.09 ± 0.70	2.60 ± 0.81	< 0.0001***
BASDAI	1.71 ± 1.56	3.72 ± 1.88	5.16 ± 1.95	< 0.0001****
HAQ	4.39 ± 5.01	8.0 ± 10.65	8.96 ± 9.49	0.0033**
HAD-A	4.46 ± 3.30	6.23 ± 3.21	7.50 ± 2.47	0.001***
HAD-D	5.48 ± 3.81	6.63 ± 3.30	9.00 ± 3.32	0.0016*
BASDAI-fatigue	2.58 ± 2.40	3.87 ± 2.39	5.67 ± 2.31	< 0.0001****

PDQ pain detection questionnaire, NP nocturnal pain, TBP total back pain, PP peripheral pain, CRP C-reactive protein, ASDAS-CRP ankylosing spondylitis disease activity score-CRP, BASDAI bath assessment of ankylosing spondylitis disease activity index, HAQ  health assessment questionnaire, HAD-A hospital anxiety and depression scale-anxiety, HAD-D hospital anxiety and depression scale-depression

Data are expressed as the mean ± standard deviation (SD), P value comparison between the three groups, ****P < 0.0001, ^***P < 0.001, **P < 0.01, *P < 0.05