Table 6.

Demographic and clinical characteristics of IPMN patients undergoing surgery or surgery plus chemotherapy before and after PSM.

Variables	Before PSM			After PSM
	Surgery (n = 417)	Surgery + chemotherapy (n = 280)	P-value	Surgery (n = 234)	Surgery + chemotherapy (n = 234)	P-value
Gender			0.747			0.926
Male	236 (56.6%)	155 (55.4%)		125 (53.4%)	124 (53.0%)
Female	181 (43.4%)	125 (44.6%)		109 (46.6%)	110 (47.0%)
Age (years)			<0.001			0.778
<70	211 (50.6%)	181 (64.6%)		136 (58.1%)	139 (59.4%)
≥70	206 (49.4%)	99 (35.4%)		98 (41.9%)	95 (40.6%)
Race			0.172			0.077
Black	43 (10.3%)	18 (6.4%)		32 (13.7%)	17 (7.3%)
White	338 (81.1%)	233 (83.2%)		178 (76.1%)	191 (81.6%)
Other	36 (8.6%)	29 (10.4%)		24 (10.2%)	26 (11.1%)
Tumor size (cm), ± SD	3.70 ± 2.67	4.25 ± 5.94	0.102
Marital status			0.439			0.056
Married	256 (61.4%)	180 (64.3%)		135 (57.7%)	156 (66.7%)
Other	161 (38.6%)	100 (35.7%)		99 (42.3%)	78 (33.3%)
Location			0.988			0.525
Head	307 (73.6%)	206 (73.6%)		171 (73.1%)	177 (75.6%)
Body/tail	110 (26.4%)	74 (26.4%)		63 (26.9%)	57 (24.4%)
Grade			<0.001			0.929
Well differentiated	237 (56.8%)	178 (63.6%)		150 (64.1%)	147 (62.8%)
Poorly differentiated	53 (12.7%)	62 (22.1%)		47 (20.1%)	47 (20.1%)
Unknown	127 (30.5%)	40 (14.3%)		37 (15.8%)	40 (17.1%)
Tumor number			0.121			1.000
Single	371 (89.0%)	259 (92.5%)		215 (91.9%)	215 (91.9%)
Multiple	46 (11.0%)	21 (7.5%)		19 (8.1%)	19 (8.1%)
Tumor stage			<0.001			1.000
Localized	192 (46.0%)	57 (20.4%)		57 (24.3%)	57 (24.3%)
Regional	188 (45.1%)	177 (63.2%)		142 (60.7%)	142 (60.7%)
Distant	37 (8.9%)	46 (16.4%)		35 (15.0%)	35 (15.0%)

PSM, propensity score matching; SD, standard deviation. Bold indicates significance.