Table 1

Population characteristics for patients with and without readmission within 30 days after discharge

VariableTotalWithWithoutP value
n138 22210 300 (7.5%)127 922 (92.5%)
Sex (=female)73 580 (53.2%)4808 (46.7%)68 772 (53.8%)<0.001*
Age60.53/17.763.25/16.960.31/17.7<0.001†
Geographical region<0.001‡
 Zurich33 861 (24.5%)2656 (25.8%)31 205 (24.4%)
 Lake Geneva17 165 (12.4%)1057 (10.3%)16 108 (12.6%)
 Midland25 790 (18.7%)1895 (18.4%)23 895 (18.7%)
 Northwest21 009 (15.2%)1565 (15.2%)19 444 (15.2%)
 East19 330 (14.0%)1583 (15.4%)17 747 (13.9%)
 Ticino12 562 (9.1%)988 (9.6%)11 574 (9.0%)
 Central8505 (6.2%)556 (5.4%)7949 (6.2%)
 Purchasing power101.78/20.3101.45/20.1101.80/20.30.209†
 Surgical/medical (=medical)52 657 (38.1%)5174 (50.2%)47 483 (37.1%)<0.001*
 Length of stay4.56/4.89.07/8.94.20/4.1<0.001†
Major diagnostic category<0.001‡
 Musculoskeletal system29 362 (21.2%)1176 (11.4%)28 186 (22.0%)
 Digestive system22 488 (16.3%)1396 (13.6%)21 092 (16.5%)
 Circulatory system17 682 (12.8%)1588 (15.4%)16 094 (12.6%)
 Female reproductive system9263 (6.7%)489 (4.7%)8774 (6.9%)
 Kidney and urinary tract8598 (6.2%)1403 (13.6%)7195 (5.6%)
 Ear, nose, mouth and throat8102 (5.9%)537 (5.2%)7565 (5.9%)
 Respiratory system7213 (5.2%)649 (6.3%)6564 (5.1%)
 Skin, subcutaneous tissue and breast7118 (5.1%)560 (5.4%)6558 (5.1%)
 Nervous system6989 (5.1%)544 (5.3%)6445 (5.0%)
 Hepatobiliary system and pancreas5442 (3.9%)569 (5.5%)4873 (3.8%)
 Male reproductive system4459 (3.2%)346 (3.4%)4113 (3.2%)
 Other11 506 (8.3%)1043 (10.1%)10 463 (8.2%)
Cost weight0.99/0.71.15/1.00.97/0.7<0.001†
  • *Kruskal-Wallis test.

  • †Fisher exact test.

  • ‡X2 test.