Primary Spontaneous Pneumothorax Admitted in Emergency Unit: Does First Episode Differ from Recurrence? A Cross-Sectional Study

Table 1

Patients characteristics and conditions of occurrence in first PSP and recurrence admissions.

Variables	Category	First PSP; (%)	Recurrence PSP; (%)	value
Gender				0.87
	Female	199 (21.75%)	125 (21.97%)
	Male	716 (78.25%)	444 (78.03%)
Age				0.34
	<30 years	623 (68.76%)	369 (65.54%)
	30–39 years	215 (23.73%)	152 (27.00%)
	40–49 years	68 (7.51%)	42 (7.46%)
Smokers				0.30
	Yes	534 (76.83%)	270 (74.38%)
	No	161 (23.17%)	93 (25.62%)
Cannabis				0.13
	Yes	54 (5.95%)	22 (3.85%)
	No	854 (94.05%)	550 (96.15%)
Date of occurrence				0.46
	Week	704 (76.94%)	427 (74.91%)
	Weekend	211 (23.06%)	143 (25.09%)
Season of occurrence				0.25
	Spring	216 (23.61%)	157 (27.54%)
	Summer	219 (23.93%)	114 (20.00%)
	Autumn	246 (26.89%)	152 (26.67%)
	Winter	234 (25.57%)	147 (25.79%)
Conditions of occurrence				0.90
	Rest	496 (77.38%)	281 (77.41%)
	Activity	145 (22.62%)	82 (22.59%)
Place of occurrence
	At home	378 (55.75%)	252 (64.62%)
	Other	300 (44.25%)	138 (35.38%)
Time of occurrence
	Day	388 (65.76%)	202 (59.24%)
	Night	202 (34.24%)	139 (40.76%)

PSP, primary spontaneous pneumothorax.
value: degree of statistical significance in multilevel analysis.
Values with are the significant variable.