Table 4.

P-values for difference between P. aeruginosa PA14 biofilm survival ratio after tobramycin treatment of different durations. * indicates P < 0.01 and ** indicates P < 0.001

		TSB				CaMHB
Biofilm age (hours)	Treatment durations (days)	1	2	4	7	1	2	4	7
24	1	–	0.553	0.188	0.578	–	0.042	0.535	0.309
	2		–	0.220	0.518		–	*	0.218
	4			–	0.101			–	0.113
	7				–				–
72	1	–	*	**	**	–	0.016	**	**
	2		–	**	**		–	0.128	*
	4			–	**			–	0.233
	7				–				–