Smokers		Non-smokers
	Beta	95% CI	Beta	95% CI
Table 1A
ASDAS	0.400	0.009 to 0.792	0.256	−0.069 to 0.581
BASDAI (0–10)	−0.002	−0.162 to 0.157	−0.064	−0.131 to 0.002
Night pain (0–10)	0.191	0.050 to 0.332	0.0041	−0.020 to 0.101
Pt's gb disease (0–10)	0.089	−0.042 to 0.220	0.003	−0.059 to 0.066
ESR (mm/h)	0.049	−0.005 to 0.103	0.029	−0.027 to 0.085
CRP (mg/L)	0.090	0.029 to 0.151	0.047	0.011 to 0.084
Table 1B
ASDAS	0.733	0.137 to 1.137	0.103	−0.109 to 0.315
BASDAI (0–10)	0.214	−0.047 to 0.529	0.018	−0.058 to 0.094
Night pain (0–10)	0.298	0.101 to 0.495	0.042	−0.005 to 0.089
Pt's gb disease (0–10)	0.187	−0.030 to 0.403	0.055	−0.002 to 0.111
CRP (mg/L)	0.020	−0.001 to 0.041	−0.003	−0.032 to 0.025