Table 3. A multivariate analysis to determine the relationship between the modified LANZA score and independent risk factors.

Variable	Regression coefficient	Standard error	p-value	95%CI (lower limit)	95%CI (upper limit)
Constant	-0.553	0.278	0.0471	-1.098	-0.00712
Age	0.00515	0.00330	0.119	-0.00133	0.0116
Steinbrocker class	0.129	0.0556	0.0202*	0.0202	0.238
PSL dose	0.0381	0.0115	<0.001**	0.0156	0.0606
Usage of NSAIDs	0.279	0.0702	<0.001**	0.141	0.417
PPIs	-0.208	0.0731	0.00455**	-0.351	-0.0643
Gastroprotective drugs	0.102	0.0726	0.159	-0.0402	0.244

PSL, prednisolone; NSAIDs, non-steroidal anti-inflammatory drugs; PPIs, proton pump inhibitors. Data were analyzed using a multivariate analysis,

*p<0.05,

**p<0.01.