Table 4.

Correlation between pathological parameters and chromosome 9p status.

Study	Pathological parameters	Chromosome 9/9p status (n=) or (%)		Fisher's exact test
		9p loss	9p retained	P=
(1) Schraml et al., 2001 [39]	pT1/2	12	29	0.27
	pT3/T4	9	38
	N0M0	19	57	0.53
	N+M+	2	10
(2) La Rochelle et al., 2010 [29]	pT1/2	38	349	<0.01
	pT3/T4	59	257
	N0M0	43	400	<0.01
	N+M+	54	206
(3) Schraml et al., 2000 [40]	pT1/2	4	9	0.054
	pT3	2	7
(4) Li et al., 2011 [35]	pT1/2	12	40	0.007
	pT3/4	14	12
	N0	23	46	1
	N+	3	6
(5) Gunawan et al., 2003 [33]	G1/2	6	33	Not assessed
	G3/4	2	4
	pT1/2	3	31
	pT3/4	4	6	0.004
	N0M0	3	31
	N+M+	5	5	0.04
(6) Klatte et al., 2009 [16]	pT1/2	Not stated clearly		0.001
	pT3/4
	N+	50%	14%	0.027
	M+	67%	14%	0.002