2.

确诊时间[中位数（95%CI）]及影响因素分析

diagnosis time [median (95%CI)] and analysis of influencing factors

	Characteristics	n	Diagnosis time (d)	t/χ2	P
SCLC: small cell lung cancer.
Gender	Male	266	42.5 (25-90)	0.149	0.882
	Female	233	36 (27-90)
Age (yr)	< 70	434	40 (24-90)	1.014	0.311
	≥70	66	49.5 (30-116.3)
Smoking	Yes	205	45 (24.5-90)	0.841	0.401
	No	286	39 (28-90)
Symptom	Yes	324	60 (30-100)	0.293	0.770
	No	176	30 (20-67.5)
Histology type	Adenocarcinoma	372	41 (26.5-94.5)	5.367	0.068
	Squamous cell carcinoma	85	45 (29-90)
	SCLC	31	30 (21-60)
Stage	Ⅰ-Ⅲa	295	40 (24-90)	0.191	0.849
	Ⅲb-Ⅳ	205	50 (28.5-90)
Driver gene	Positive	196	42 (24-90)	0.379	0.705
	Negative	101	45 (30-120)