Table 1.

Residential and hospital admission characteristics of 4097 oral cancer patients in South China by sex

Variate	Total	Male	Female	M:F ratio	P
Period of hospital admission	4097	2729	1368	1.99	<0.05
1960–1973	432	293	139	2.11
1974–1983	500	344	156	2.21
1984–1993	803	549	254	2.16
1994–2003	959	635	324	1.96
2004–2013	1403	908	495	1.83
Subcultural areaa	3630	2418	1212	2.00	<0.05
Guangfu (Cantonese)	2470	1602	868	1.85
Hakka	488	315	173	1.82
Chaoshan	481	340	141	2.41
Unknown	191	161	30	5.37
Economic regionb	3661	2427	1234	1.97	<0.05
Pearl river delta region	2479	1617	862	1.88
Non-pearl river delta region	1072	736	336	2.19
Unknown	110	74	36	2.06

^aA total of 467 non-Cantonese patients were excluded from this analysis

^bA total of 436 patients who live in other provinces were excluded from this analysis