Thesis

35 Prolonged length of stay of older patients in the ED CHAPTER 2 Table 4 Bivariate analysis: factors associated with a prolonged LOS at the ED (LOS > 293 minutes). Prolonged ED-LOS Variable All patients (n=2000) No (n=1495) Yes (n=505) p-value Patient characteristics Age at ED visit, mean ± SD 78 ± 6.2 78 ± 6.4 78 ± 5.9 0.631 Sex, n (%) 0.792 Men 1048 (52) 786 (53) 262 (52) Women 952 (48) 709 (47) 243 (48) Presence of cognitive impairment, n (%) 346 (17) 256 (17) 90 (18) 0.722 Polypharmacy, n (%) 1310 (66) 945 (63) 365 (72) <0.0012 CACI, mean ± SD 5.6 ± 2.1 5.5 ± 2.1 5.6 ± 2.1 0.461 Organizational and logistical factors Day of presentation, n (%) 0.0362 Monday through Friday 1536 (77) 1131 (76) 405 (80) Saturday and Sunday 464 (23) 364 (24) 100 (20) Time of presentation, n (%) 0.0222 Night (00.00 - 6.59) 138 (6.9) 108 (7.2) 30 (5.9) Morning (7.00 - 11.59) 406 (20) 306 (20) 100 (20) Afternoon (12.00 - 17.59) 980 (49) 705 (47) 275 (54) Evening (18.00 - 23.59) 476 (24) 376 (25) 100 (20) Number of consultations per patient, mean ± SD 0.47 ± 0.74 0.34 ± 0.63 0.84 ± 0.90 <0.0011 Number of diagnostic interventions per patient, mean ± SD 2.2 ± 1.4 2.0 ± 1.3 2.9 ± 1.3 <0.0011 Number of therapeutic interventions per patient, mean ± SD 0.096 ± 0.33 0.10 ± 0.34 0.07 ± 0.29 0.0711 Mode of presentation, n (%) <0.0012 General practitioner 760 (38) 538 (36) 222 (44) Specialist of our institution 561 (28) 425 (28) 136 (27) Emergency call 447 (22) 333 (22) 114 (23) Self-referral 157 (7.9) 134 (9.0) 23 (4.6) Other hospital 75 (3.8) 65 (4.4) 10 (2.0) Method of transport, n (%) 0.0212 Self-transport 1171 (59) 862 (58) 309 (61) Ambulance 782 (39) 590 (39) 192 (38) HEMS 33 (1.7) 32 (2.1) 1 (0.20) Other 14 (0.70) 11 (0.74) 3 (0.59) Seniority of physician, n (%) 0.0152 Resident 1678 (84) 1237 (83) 441 (87) Attending specialist 322 (16) 258 (17) 64 (13)

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