Table 3– Clinical characteristics of stage IV nonsmall cell lung cancer patients who presented with and without miliary intrapulmonary carcinomatosis (MIPC) at initial diagnosis

	With MIPC	Without MIPC	p-value
Total	60	673
Age yrs	61.4 (39.1–87.7)	63.9 (24.8–91.4)	0.130^#
Sex			0.485
Females	35	361
Males	25	312
Smoking			0.091
Nonsmokers	47	456
Former/current smokers	13	217
Tumour type			1.000^¶
Nonadenocarcinoma	2	33
Adenocarcinoma	58	640
Distant metastasis
Bone	37	311	0.022
Brain	22	157	0.021
Liver	17	104	0.010
Malignant pleural effusion	27	331	0.535
Adrenal gland	8	74	0.582
Others	7	71	0.788

Data are presented as n or mean (range), unless otherwise stated. p-values were calculated by the Chi-squared test, unless otherwise stated. ^#: t-test; ^¶: Fisher’s exact test.