Table 1

Demographic characteristics of 3985 patients admitted to four hospitals in Riyadh

CharacteristicFrequency (%)Mean±SD
Gender
 Male2102 (52.7)
 Female1883 (47.3)
Hospital type
 Hospital 1 (teaching hospital)977 (24.5)
 Hospital 2 (private hospital)2033 (51.1)
 Hospital 3 (large government hospital)683 (17.1)
 Hospital 4 (small government hospital)292 (7.3)
Service
 Medicine1352 (33.9)
 Surgery1771 (44.5)
 Intensive care unit862 (21.6)
Age, years43.4±19.0
Length of hospital stay, days8.1±10.2
Comorbidities (Charlson's Index weight)1.1±1.4
Number of medications2.5±2.9