Table 3. Associations between the three main histologic types and other variables.

Characteristic	Histologic type			p-value
	Adenocarcinoma	Squamous cell cancer	Small cell cancer
Smoking history
Yes	122	48	25	≤ 0.001
No	92	8	5
Gender
Male	172	61	25	≤ 0.001
Female	66	1	6
Nationality
Qatari	38	19	7	0.030
Non-Qatari	200	43	24
Lung involved
Right	141	35	12	0.172
Left	73	25	14
Both	18	2	3
Stage at diagnosis
Stage 1	16	3	0
Stage 2	4	2	2	0.002
Stage 3A	7	5	1
Stage 3B	3	6	1
Stage 4	171	31	20