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Table 1 Demographic and clinical characteristics, according to pneumonia subtype

From: Pneumonia burden in elderly patients: a classification algorithm using administrative data

  HCAP PNP CAP Chi-square test
  n = 2257 n = 6775 n = 17107  
  n% n% n% p value
Gender     
Females 939(41.6) 3236(47.8) 7704(45.0) <0.001
Males 1318(58.4) 3539(52.2) 9403(55.0) <0.001
Residence     
Rome 1422(63.0) 4231(62.5) 10143(59.3) <0.001
Province of Rome 452(20.0) 1394(20.6) 3715(21.7) <0.001
Rest of Lazio 383(17.0) 1150(17.0) 3249(19.0) <0.001
Age     
65-69 384(17.0) 724(10.7) 2152(12.6) <0.001
70-74 486(21.5) 1052(15.5) 2894(16.9) <0.001
75-79 561(24.8) 1428(21.1) 3791(22.2) <0.001
80-84 398(17.6) 1591(23.5) 3810(22.3) <0.001
85-89 287(12.7) 1170(17.3) 2629(15.4) <0.001
90+ 141(6.25) 810(11.9) 1831(10.7) <0.001
Socioeconomic position (Rome residents only)     
1 (high) 210(9.3) 687(10.1) 1483(8.7) <0.001
2 247(10.9) 640(9.4) 1591(9.3) <0.001
3 231(10.2) 702(10.4) 1695(9.9) <0.001
4 239(10.6) 684(10.1) 1664(9.7) <0.001
5 (low) 238(10.5) 655(9.7) 1815(10.6) <0.001
Respiratory conditions     
Oxygen therapy (previous year) 279(12.3) 756(11.2) 2219(13.0) 0.001
COPD (previous two years) 494(21.9) 1122(16.6) 3555(20.8) <0.001
Respiratory failure (previous two years) 242(10.7) 453(6.7) 1620(9.5) <0.001
Influenza Vaccination (previous two years) 1218(54.0) 3820(56.4) 6955(40.7) <0.001
Acute stroke (same admission) 97(4.3) 573(8.5) 145(0.8) <0.001
Comorbidities (previous two years)     
Heart failure 551(24.4) 2073(30.6) 3461(20.2) <0.001
Diabetes 415(18.4) 902(13.3) 2217(13.0) <0.001
Chronic kidney disease 632(28.0) 1121(16.5) 2313(13.5) <0.001
Malignant tumours 721(31.9) 1397(20.6) 2148(12.6) <0.001
Hypertension 827(36.6) 1698(25.1) 4327(25.3) <0.001
Ischemic heart disease 583(25.8) 1573(23.2) 3882(22.7) 0.004
Other heart disease 528(23.4) 1287(19.0) 2835(16.6) <0.001
Arrhythmias 602(26.7) 1986(29.3) 4267(24.9) <0.001
Cerebrovascular disorders 745(33.0) 2023(29.9) 4251(24.8) <0.001
Digestive disease 139(6.2) 540(8.0) 997(5.8) <0.001
Anaemias/coagulopathies 403(17.9) 883(13.0) 1972(11.5) <0.001
Neurological diseases 356(15.8) 914(13.5) 1951(11.4) <0.001
Psychiatric diseases 217(9.6) 631(9.3) 1714(10.0) 0.243
Chronic respiratory diseases (other than COPD) 113(5.0) 378(5.6) 970(5.7) 0.435
Severity of disease (same admission)     
Ventilation 417(18.5) 207(3.1) 475(2.8) <0.001
Intensive care 580(25.7) 367(5.4) 563(2.8) <0.001
Type of hospital     
Public 1361(60.3) 4485(66.2) 11297(66.0) <0.001
Teaching 598(26.5) 1391(20.5) 2967(17.3) <0.001
Private 298(13.2) 899(13.3) 2843(16.6) <0.001
Mortality     
In hospital 729(32.3) 1667(24.6) 2269(13.3)  
30 day-mortality 863(38.2) 1916(28.3) 2710(15.8)  
  Mean Median Mean Median Mean Median  
Length of hospital stay 27.1 17.0 16.8 13.0 13.2 10.0