Table 3

Characteristics of medical institutions (qualitative variables)

Variable		Number	Proportion (%)
Grade	Grade II level A	4	4.94
	Grade II level B	7	8.64
	Grade III level A	25	30.86
	Grade III level B	12	14.81
	No grade	33	40.74
Administrative rank	Municipal hospital	19	23.46
	Independent physical examination institution	2	2.47
	Provincial hospital	6	7.41
	County-level hospital	19	23.46
	Community health centre	35	43.21
Nature	Governmental hospital	78	96.30
Nature	Private hospital	3	3.70
Carrying out physical examination	Yes	63	77.78
Carrying out physical examination	No	18	22.22
Does the physical examination centre set up CT?	Yes	41	50.62
Does the physical examination centre set up CT?	No	40	49.38
Does the physical examination centre carry out lung cancer screening?	Yes	42	51.85
	No	39	48.15
Does the physical examination centre carry out low-dose spiral CT screening?	Yes	36	44.44
	No	45	55.56
Which department will be recommended after detecting pulmonic nodules in the physical examination centre?	Respiratory medicine	57	70.37
	Thoracic surgery	18	22.22
	Oncology	6	7.41
Are there any referrals after pulmonic nodules detected in the physical examination centre?	Yes	47	58.02
	No	34	41.98
Referral hospital	West China hospital	12	25.53
	Hospital with grade III	34	72.34
	Hospital with grade II	1	2.130
If joined in the medical alliance for pulmonic nodules/lung cancer	Yes	23	28.40
	No	58	71.60
If trained for medical workers according to the guidelines of low-dose spiral CT screening for lung cancer in China	Yes	31	38.27
	No	50	61.73
If knew number of patients with early-stage lung cancer	Very familiar	6	7.41
	Generally familiar	30	37.04
	Unfamiliar	45	55.56