Table 3 Subgroup of ischaemic strokes or TIA stratified by age groups (demographic characteristics, risk factors, and stroke subtypes)
Total groups | Age 18-34 years | Age 35-44 years | Age 45-55 years | |||||
|---|---|---|---|---|---|---|---|---|
sifap1 (n = 4467) | GQH (n = 14522) | sifap1 (n = 563) 12.6% | GQH (n = 1049) 7.2%*** | sifap1 (n = 1224) 27.4% | GQH (n = 2962) 20.4%*** | sifap1 (n = 2680) 60% | GQH (n = 10511) 72.4%*** | |
Sex (males); (n = 4467, Sifap1) | 59.4% | 61.2%* | 42.8% | 46.3% | 57.9% | 57.9% | 63.5% | 63.5% |
Age (years); mean, median and 25th-75th percentile (n = 4467, Sifap1) | 44.747 (40-51) | 47.5*** 50 (44-53) | 28.329 (25-32) | 28.4 29 (25-32) | 40.541 (38-43) | 40.6 41 (39-43) | 50.150 (47-53) | 51.4*** 51 (48-53) |
Previous cerebrovascular event (n = 4466, Sifap1) | 16.9% | 11.9%*** | 12.8% | 7.7%** | 15.4% | 8.2%*** | 18.6% | 13.3%*** |
Proportion of TIA (n = 4467, Sifap1) | 24.0% | 36.4%*** | 21.8% | 41.5%*** | 25.1% | 39.7%*** | 23.9% | 34.9%*** |
Vascular risk profile | ||||||||
Hypertension (n = 4439, Sifap1) | 46.6% | 49.5%** | 13.1% | 11.6% | 36.7% | 31.7%** | 58.2% | 58.2% |
Diabetes mellitus (n = 4443, Sifap1) | 10.3% | 14.4%*** | 2.0% | 3.1% | 7.7% | 8.6% | 13.3% | 17.1%*** |
Current smoking (n = 4466, Sifap1) | 42.5% | 40.8%* | 37.5% | 33.5% | 42.1% | 41.3% | 43.8% | 41.5% |
Stroke subtypes according to TOAST | n = 4345 | n = 14169 | n = 555 | n = 1006 | n = 1201 | n = 2902 | n = 2589 | n = 10261 |
Atherosclerosis | 16.4% | 22.3%***a | 4.1% | 8.8%***a | 10.4% | 13.6%***a | 21.8% | 26%***a |
Cardiac embolic source | 15.1% | 12.1% | 18.6% | 15.3% | 17.7% | 13.4% | 13.2% | 11.4% |
Small artery occlusion | 13.7% | 19.2% | 6.3% | 8.2% | 9.5% | 13.7% | 17.2% | 21.8% |
Other determined cause | 16.5% | 9.8% | 24.5% | 16.7% | 20.8% | 14.3% | 12.8% | 7.8% |
Undetermined cause | 38.3% | 36.7% | 46.5% | 51.0% | 41.6% | 45.0% | 34.9% | 33.0% |