Table 1.

Distribution of basic characteristics of lung cancer cases

	Male		Female		p-value*
	Number	Percent	Number	Percent
Histology	2734	100.0	1110	100.0	<0.001
Squamous cell carcinoma	585	21.4	93	8.4
Adenocarcinoma	908	33.2	583	52.5
Non-small cell carcinoma	131	4.8	41	3.7
Other	219	10.7	71	6.4
Unknown	791	28.9	322	29.0
Age (mean, SD)	64.5	12.4	63.8	14.4	<0.605**
Religion					<0.001
Buddhist & others	2328	85.1	1004	90.4
Muslim	406	14.9	106	9.6
District					0.047
Muang Songkhla	455	16.6	161	14.5
Sathing Phra	101	3.7	56	5.1
Chana	194	7.1	77	6.9
Na Thawi	135	4.9	41	3.7
Thepha	116	4.2	42	3.8
Saba Yoi	64	2.3	21	1.9
Ranot	150	5.5	71	6.4
Krasae Sin	30	1.1	14	1.3
Rattaphum	113	4.1	46	4.1
Sadao	265	9.7	79	7.1
Hat Yai	782	28.6	355	32.0
Na Mom	47	1.7	23	2.1
Khuan Niang	58	2.1	37	3.3
Bang Klam	45	1.6	17	1.5
Singhanaknon	141	5.2	55	4.9
Khlong Hoi Khong	38	1.4	15	1.3
Year interval					<0.001
1989–1993	272	10.0	92	8.3
1994–1998	336	12.3	130	11.7
1999–2003	434	15.9	178	16.0
2004–2008	794	29.0	257	23.2
2009–2013	898	32.8	453	40.8

* Chi square test

** Wilcoxon rank sum test