Research Article
Stroke Mortality, Clinical Presentation and Day of Arrival: The Atherosclerosis Risk in Communities (ARIC) Study
Table 1
Baseline characteristics (1987–1989) of stroke patients by day of hospital arrival in the atherosclerosis risk in communities (ARIC) Study.
| Study variables | Weekday arrivals (, 77%) | Weekend* arrivals (, 23%) | value† |
| Mean age in years (95% CI) | 66.4 (65.8, 66.9) | 66.9 (66.0, 67.8) | | Gender | | | | Male | 348 (49) | 108 (50) | .88 | Female | 363 (51) | 110 (50) | | Race | | | | White | 394 (56) | 116 (54) | .66 | African American | 314 (44) | 99 (46) | | Center | | | | Forsyth County | 134 (19) | 58 (27) | .05 | Jackson | 285 (40) | 83 (38) | | Minneapolis | 122 (17) | 38 (17) | | Washington County | 170 (24) | 39 (18) | | Race center category | | | | Forsyth blacks | 29 (4) | 16 (7) | .07 | Forsyth whites | 105 15) | 42 (20) | | Minneapolis whites | 119 (17) | 35 (16) | | Washington Co. whites | 170 (24) | 39 (18) | | Jackson blacks | 285 (40) | 83 (39) | | Stroke type | | | | Ischemic | 629 (89) | 192 (88) | .87 | Hemorrhagic | 82 (11) | 26 (12) | | Stroke event | | | | Incident | 589 (83) | 191 (88) | .09 | Recurrent | 122 (17) | 27 (12) | | Onset to brain imaging | | | | <24 hours | 455 (71) | 144 (71) | .84 | ≥24 hours | 183 (29) | 60 (29) | | Mean length of stay (95% CI) | 10.3 (9.4, 11.2) | 9.1 (7.9, 10.3) | | Current drinker | 332 (48) | 99 (46) | .62 | Current smoker | 241 (34) | 76 (35) | .80 | Mean cigarette years of smoking | 396.4 (359.6, 433.2) | 377.4 (313.5, 441.2) | | Charlson comorbidity score | 2.28 (2.20, 2.37) | 2.22 (2.08, 2.37) | .89 | Death within 28 days | 68 (9.6) | 22 (10.1) | .82 | Event year | | | | 1987–1994 | 170 (24) | 51 (23) | .76 | 1995–1998 | 192 (26) | 64 (29) | | 1999–2001 | 179 (25) | 48 (22) | | 2002–2004 | 170 (24) | 55 (25) | |
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*Weekend defined as any arrival time from midnight Friday to midnight Sunday. †Two-sided chi-squared test of equal proportions.
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