Table 1

Baseline patient characteristics and absolute standardised difference before and after 1:1 propensity score matching of patients with pneumonia with or with no concurrent hyperlipidaemia

Study cohortsPneumonia, unmatched entire cohort, n=8553Pneumonia, matched entire cohort, n=3764
Study groupsWith hyperlipidaemia
n=2278 (27%)
With no hyperlipidaemia
n=6275 (73%)
P valueWith hyperlipidaemia
n=1879
With no hyperlipidaemia
n= 1879
P value
DemographicsOverall age, years, mean±SD71.1±14.168.0±18.0<0.000170.5±14.564.2±18.5<0.0001
Age <65, n (%)680 (29)2296 (37)<0.0001574 (31)904 (48)
Age ≥65, n (%)1654 (71)3923 (63)1306 (69)978 (52)
Male, n (%)1250 (54)3259 (52)0.9040997 (53)997 (53)1.000
Female, n (%)1084 (46)2960 (48)885 (47)885 (47)1.000
White, n (%)2159 (93)5344 (86)<0.00011734 (92)1734 (92)1.000
Non-white, n (%)175 (7)875 (14)148 (8)148 (8)1.000
Anthropometric measurementsBMI, kg/m229.6±7.327.9±7.3<0.000129.2±7.128.9±7.90.3165
BMI, missing, n (%)36 (2.0)964 (14.0)00
Clinical characteristicsLOS, days, median (quartiles 25%–75%)3 (2–5)3 (2–6)<0.00013 (2–5)4 (2–7)<0.0001
Comorbid conditions with prevalence ≥3%CAD, n (%)706 (42)983 (14)<0.0001612 (32)319 (17)<0.0001
Cancer, n (%)501 (29)1595 (23)0.0044486 (26)459 (24)0.3284
CKD, n (%)386 (28)668 (10)<0.0001312 (16)310 (16)0.9650
COPD, n (%)497 (29)1795 (26)0.1615507 (27)438 (23)0.0106
Diabetes, n (%)608 (36)1204 (18)<0.0001524 (28)585 (31)0.0319
Heart failure, n (%)330 (20)1082 (16)0.0053321 (17)291 (15)0.2002
Hypertension, n (%)1277 (75)2775 (40)<0.00011115 (59)990 (53)<0.0001
Stroke, n (%)54 (3)92 (13)<0.000146 (2)54 (3)0.4782
Lipid levelsLDL-C, mg/dL87.9±38.097.9±38.5<0.0001109.0±40.587.0±36.0<0.0001
LDL-C, missing data, n (%)541 (31.9)3885 (56.6)447 (24)1019 (54)
Drug treatmentStatin1133 (49)1033 (17)<0.0001683 (36)610 (32)0.0134
Follow-upMedian (quartiles 25%–75%), years4.0 (1.5–7.4)3.9 (1.0–9.4)0.51034.1 (1.5–8.3)4.5 (1.5–8.8)0.0875
Person-years11 91035 91410 12810 979
  • BMI, body mass index; CAD, coronary artery disease; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; LDL-C, low-density lipoprotein cholesterol; LOS, length of hospital stay.