Table 1.

Comparison of baseline data between patients with pulmonary infection and the uninfected group

Factors	Total	Pulmonary Infection Group (n = 238)	Non-infection Group (n = 406)	t/Z/χ2 Value	P Value
Gender				0.568	0.451
Male	342	131	211
Female	302	107	195
Diabetes				4.27	0.039
Yes	132	59	73
No	512	179	333
Hypertension				1.368	0.242
Yes	132	43	89
No	512	195	317
COPD				18.059	<0.001
Yes	200	98	102
No	444	140	304
Chemotherapy Intensity				34.299	<0.001
Single	297	74	223
Combination	347	164	183
Clinical Stage				1.14	0.286
III	428	152	276
IV	216	86	130
Chemotherapy Cycle				23.096	<0.001
>4	232	114	118
≤4	412	124	288
Use of Antibiotics				5.005	0.025
Yes	312	129	183
No	332	109	223
Age (years)	24.17 ± 2.99	69.00 [63.00, 74.00]	64.00 [60.00, 68.00]	8.153	<0.001
BMI (kg/m2)	80.00 [70.00, 90.00]	23.97 ± 3.18	24.28 ± 2.88	-1.234	0.218
KPS Score	651.53 ± 202.61	70.00 [60.00, 80.00]	80.00 [70.00, 100.00]	-8.564	<0.001
SII	39.92 [36.88, 42.97]	921.19 [807.34, 1050.80]	608.97 [500.62, 702.66]	23.125	<0.001
PNI	2.25 ± 0.90	37.50 [33.91, 41.02]	40.94 [38.27, 43.66]	-9.377	<0.001
CRP (g/L)	24.17 ± 2.99	2.59 [2.13, 3.20]	1.12 [0.91, 1.37]	27.342	<0.001

Note: COPD, Chronic Obstructive Pulmonary Disease; BMI, Body Mass Index; KPS, Karnofsky Performance Status; SII, Systemic Inflammatory Index; PNI, Prognostic Nutritional Index; CRP, C-Reactive Protein.