Table 6.

Logistic regression analysis of odds ratio for failure with different preservatives

Preservative	OR	95% LB	95% UB	P
BAK	0.33	0.01	8.61	0.44
PQ1	0.87	0.23	3.00	0.83
SOC	0.58	0.17	1.99	0.38
BAK + PQ1	0.69	0.17	2.49	0.59
BAK + SOC	0.64	0.19	2.20	0.47
PQ1 + SOC	0.85	0.17	3.40	0.82
BAK + PQ1 + SOC	0.97	0.19	3.97	0.97

BAK Benzalkonium chloride, OR odds ratio PQ1 polyquaternium-1, SOC stabilized oxychloro complex