Brief Article
Copyright ©2012 Baishideng Publishing Group Co.
World J Gastroenterol. Aug 21, 2012; 18(31): 4175-4181
Published online Aug 21, 2012. doi: 10.3748/wjg.v18.i31.4175
Table 1 Patient and hospital characteristics by surgical volume
CharacteristicsVery-low (n = 92)Low (n = 20)Medium (n = 10)High (n = 3)Very-high (n = 1)P value
Age (mean ± SD) (yr)62.2 ± 10.762.1 ± 10.262.1 ± 10.561.2 ± 9.959.9 ± 10.3 0.077
Sex ratio (M:F)1.51.31.51.61.6 0.282
Admission route< 0.001
Outpatient department (%)803 (78.6)774 (77.0)788 (77.3)901 (84.4)593 (68.9)
Emergency room (%)218 (21.4)231 (23.0)232 (22.7)167 (15.6)268 (31.1)
Charlson comorbidity score 0.193
< 3 (%)683 (66.9)651 (64.8)680 (66.7)667 (62.5)554 (64.3)
≥ 3 (%)338 (33.1)354 (35.2)340 (33.3)401 (37.5)307 (35.7)
Type of medical security< 0.001
Health insurance (%)919 (90.0)925 (92.0)955 (93.6)1048 (98.1)841 (97.7)
Medical aid (%)102 (10.0)80 (8.0)65 (6.4)20 (1.9)20 (2.3)
Type of operation< 0.001
CPD (%)604 (59.2)420 (41.8)361 (35.4)325 (30.4)301 (35.0)
PPPD (%)417 (40.8)585 (58.2)659 (64.6)743 (69.6)560 (65.0)
Average annual volume< 1010-1819-3554-1112159.91