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Table 1 Demographic characteristics of study populations and stratified prevalence of stroke [n(%)]

From: Prevalence of stroke and stroke related risk factors: a population based cross sectional survey in southwestern China

VariablesHigh risk population for strokeOverall strokeIschemic strokeHemorrhagic stroke
Total (n = 16,892)2893 (17.1%)524 (3.1%)429 (2.5%)95 (0.6%)
Sex
 Male(n = 5411)1370 (25.3%)201 (3.7%)158 (2.9%)43 (0.8%)
 Female(n = 11,481)1523 (13.3%)323 (2.8%)271 (2.4%)52 (0.5%)
P value<  0.0010.003 (9.94)0.029 (4.65)0.006 (7.68)
Age, y
 40–49(n = 3524)318 (9.0%)37 (1.0%)30 (0.8%)7 (0.2%)
 50–59(n = 5106)686 (13.4%)103 (2.0%)87 (1.7%)16 (0.3%)
 60–69(n = 5803)1125 (19.4%)228 (3.9%)188 (3.2%)40 (0.7%)
 70–79(n = 2183)629 (28.8%)131 (6.0%)106 (4.9%)25 (1.1%)
  ≥ 80(n = 276)135 (48.9%)25 (9.1%)18 (6.5%)7 (2.5%)
P value<  0.001<  0.001<  0.001<  0.001
Residence
 Urban(n = 8889)1361 (15.3%)260 (2.9%)203 (2.3%)57 (0.6%)
 Rural(n = 8003)1532 (19.1%)264 (3.3%)226 (2.8%)38 (0.5%)
P value<  0.0010.186 (1.96)0.026 (4.96)0.173 (2.09)
Education
 Primary school or below (n = 8331)1948 (23.4%)369 (4.4%)310 (3.7%)59 (0.7%)
 Junior middle school(n = 3312)568 (17.1%)106 (3.2%)83 (2.5%)23 (0.7%)
 Senior middle school (n = 3111)228 (7.3%)33 (1.1%)23 (0.7%)10 (0.3%)
 College or above (n = 2138)149 (0.7%)16 (0.7%)13 (0.6%)3 (0.1%)
P value<  0.001<  0.001<  0.0010.017 (10.6)
Overweight/obesity
 Yes(n = 8615)1545 (17.9%)355 (4.1%)290 (3.4%)65 (0.8%)
 No(n = 8277)1348 (16.3%)169 (2.0%)139 (1.7%)30 (0.4%)
P value0.004 (8.07)<  0.001<  0.001<  0.001
Smoking
 Yes(n = 3676)748 (20.3%)139 (3.8%)114 (3.1%)25 (0.7%)
 No(n = 13,216)2145 (16.2%)385 (2.9%)315 (2.4%)70 (0.5%)
P value<  0.0010.006 (7.2)0.017 (5.98)0.283 (1.16)
Physical inactivity
 Yes(n = 8226)1752 (21.3%)305 (3.7%)251 (3.1%)54 (0.7%)
 No(n = 8666)1141 (13.2%)219 (2.5%)178 (2.1%)41 (0.5%)
P value<  0.001<  0.001<  0.0010.124 (2.54)
Hypertension
 Yes(n = 7018)2082 (29.7%)313 (4.5%)246 (3.5%)67 (1.0%)
 No(n = 9874)811 (8.2%)211 (2.1%)183 (1.9%)28 (0.3%)
P value<  0.001<  0.001<  0.001<  0.001
Diabetes
 Yes(n = 2754)780 (28.3%)106 (3.8%)94 (3.4%)12 (0.4%)
 No(n = 14,138)2113 (14.9%)418 (3.0%)335 (2.4%)83 (0.6%)
P value<  0.0010.013 (6.1)0.003 (10.1)0.323 (0.94)
Dyslipidemia
 Yes(n = 3235)822 (25.4%)141 (4.4%)108 (3.3%)33 (1.0%)
 No(n = 13,657)2071 (15.2%)383 (2.8%)321 (2.4%)62 (0.5%)
P value<  0.001<  0.001<  0.001<  0.001
Atrial fibrillation
 Yes(n = 232)72 (31.0%)14 (6.0%)13 (5.6%)1 (0.4%)
 No(n = 16,660)2821 (17.1%)510 (3.1%)416 (2.5%)94 (0.6%)
P value<  0.0010.009 (6.7)0.006 (8.9)0.138 (2.2)
Family history
 Yes(n = 2224)528 (23.7%)86 (3.9%)55 (2.5%)31 (1.4%)
 No(n = 14,668)2365 (16.1%)438 (2.9%)374 (2.5%)64 (0.4%)
P value<  0.0010.027 (4.98)0.984 (0.05)<  0.001
  1. The prevalence rates stratified by demographic characteristics and risk factors are crude estimates