Table 7.

The relationship between clinical sample type and gene expression of recA.

recA	Sample type						P
	Sputum	Blood	Urine	Wound	Endotracheal	Total
No change	1	2	0	1	0	4	0.918 C † NS
Up regulation	5	8	3	4	1	21
Total	6	10	3	5	1	25

C – chi-square test; ^† – more than 20 % of cells have an expected count of less than 5; NS – not significant; p –p-value.