Table 3.

Factors related to the delay in diagnosis of patients with ankylosing spondylitis (results of the correlation and regression analysis).

	Correlation Analysis		Regression Analysis
	r or R²	p	B	p
Age at onset of spondylitic symptons, yrs^*	−0.216	< 0.001	−0.178	0.003
Age at onset of back pain, yrs^*	−0.140	0.006	0.080	0.002
Education level, yrs^*	−0.189	< 0.001	−0.252	0.018
Specialty of the first physician consulted^**	−0.012	0.024	−0.400	0.343
Prior diagnosis of lumbar disc herniation^**	0.032	0.001	2.278	0.018
Surgical history for lumbar disc hernation^**	0.025	0.015	6.014	< 0.001