Table 1

Baseline characteristics for the total study group and for the different BMI categories separately*

CharacteristicsTotal group
(n=25 384)
Underweight
(n=244)
Normal weight
(n=8488)
Overweight
(n=11 132)
Obese
(n=5520)
P value
Age (years)67.7±12.174.8±11.671.1±12.067.1±11.563.6±11.7<0.001
Weight (kg)81.2±16.048.2±5.968.4±9.282.7±9.599.7±14.5<0.001
Height (cm)172.9±9.7167.0±8.9172.2±9.3173.9±8.9172.3±10.6<0.001
Body mass index (kg/m2)27.2±6.117.3±1.123.0±1.627.3±1.433.8±9.4<0.001
Female sex28.9% (7345/25 384)68.9% (168/244)33.8% (2870/8488)23.4% (2606/11 132)30.8% (1701/5520)<0.001
Hypertension49.0% (12 221/24 952)43.8% (103/235)43.9% (3648/8309)48.6% (5330/10 973)57.8% (3140/5435)<0.001
Hyperlipidaemia25.5% (6325/24 792)19.0% (44/231)21.5% (1780/8266)25.8% (2810/10 899)31.3% (1691/5396)<0.001
Diabetes mellitus16.2% (4095/25 218)7.5% (18/241)11.3% (955/8427)15.0% (1666/11 072)26.6% (1456/5478)<0.001
Insulin-treated diabetes mellitus7.0% (1756/25 169)3.7% (9/241)4.7% (396/8413)6.0% (666/11 057)12.6% (685/5458)<0.001
S-creatinine (μmol/L)92.4±55.189.2±65.892.4±55.791.3±50.992.0±53.0<0.001
eGFR <30 mL/min/ m21445±5.724±9.8558±6.6576±5.2287±5.2<0.001
Previous renal failure2.5% (640/25 384)2.9% (7/244)2.7% (227/8488)2.1% (237/11 132)3.1% (169/5520)0.003
Previous dialysis0.4% (107/25 384)0.4% (1/244)0.4% (37/8488)0.4% (43/11 132)0.5% (26/5520)0.875
Current smoker28.6% (6880/24 033)41.4% (94/227)29.9% (2388/7990)27.0% (2857/10 577)29.4% (1541/5239)<0.001
Previous COPD5.3% (1355/25 384)21.3% (52/244)6.4% (546/8488)4.1% (456/11 132)5.5% (301/5520)<0.001
Previous cancer diagnosis2.3% (590/25 384)3.3% (8/244)2.6% (222/8488)2.2% (250/11 132)2.0% (110/5520)0.073
Previous dementia0.4% (96/25 384)1.6% (4/244)0.4% (38/8488)0.4% (43/11 132)0.2% (11/5520)<0.001
Previous heart failure4.4% (1120/25 384)6.6% (16/244)4.7% (395/8488)3.7% (414/11 132)5.3% (295/5520)<0.001
Previous myocardial infarction13.0% (3296/25 384)11.9% (29/244)12.6% (1073/8488)12.6% (1402/11 132)14.3% (792/5520)0.017
Previous PCI10.8% (2750/25 384)7.4% (18/244)9.7% (827/8488)11.0% (1220/11 132)12.4% (685/5520)<0.001
Previous CABG2.9% (747/25 384)1.2% (3/244)2.5% (214/8488)3.0% (334/11 132)3.6% (196/5520)0.002
Previous stroke31.9% (7661/24 033)22.5% (51/227)27.9% (2229/7990)33.8% (3579/10 577)34.4% (1802/5239)<0.001
Prior peripheral vascular disease3.4% (864/25 384)11.9% (29/244)4.1% (347/8488)3.0% (335/11 132)2.8% (153/5520)<0.001
No of days hospitalised4.0 (3.0, 5.0)4.0 (3.0, 8.0)4.0 (3.0, 6.0)4.0 (3.0, 5.0)4.0 (3.0, 5.0)<0.001
Acute occlusion60.9% (15 460/25 384)54.1% (132/244)60.4% (5129/8488)61.4% (6830/11 132)61.0% (3369/5520)0.464
Intraprocedural thrombosis19.7% (4988/25 376)16.4% (40/244)19.0% (1609/8487)20.5% (2278/11 128)19.2% (1061/5517)0.052
Successful procedure95.3% (24 017/25 194)91.5% (215/235)95.2% (8016/8420)95.8% (10 595/11 061)94.8% (5191/5478)0.847
Aspirin pre-cath lab95.3% (24 017/25 194)91.5% (215/235)95.2% (8016/8420)95.8% (10 595/11 061)94.8% (5191/5478)0.782
Clopidogrel pre-cath lab19.0% (4814/25 366)18.9% (46/244)19.3% (1638/8484)19.4% (2153/11 126)17.7% (977/5512)0.118
Ticagrelor pre-cath lab58.1% (13 800/23 736)54.6% (125/229)56.9% (4515/7941)58.5% (6077/10 385)59.5% (3083/5181)0.198
Prasugrel pre-cath lab4.1% (1032/25 368)2.9% (7/244)4.0% (342/8484)4.2% (465/11 127)4.0% (218/5513)0.705
Warfarin pre-cath lab2.1% (526/25 368)2.0% (5/244)2.2% (185/8484)2.0% (223/11 127)2.0% (113/5513)0.863
  • Data are presented as mean±SD, percentages (numerator/denominator) or medians (IQRs).

  • BMI, body mass index; CABG, coronary artery bypass grafting; COPD, chronic obstructive pulmonary disease; eGFR, estimated glomerular filtration rate; PCI, percutaneous coronary intervention.