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Table 3 Distribution of “Onset to tPA Time” among infarct patients presenting at MHH-TMC, 2008–2011 (N=1627)

From: The University of Texas Houston Stroke Registry (UTHSR): implementation of enhanced data quality assurance procedures improves data quality

Onset to tPA Time Year
   2008 2009 2010 2011 Total P-value*
   n (%) n (%) n (%) n (%) n (%)  
Received tPA 130 (30.4) 124 (34.6) 153 (38.5) 193 (44.5) 600 (36.9) -
No tPA 297 (69.4) 232 (64.6) 243 (61.2) 247 (55.8) 1019 (62.6) -
Unknown 1 (0.2) 3 (0.8) 1 (0.3) 3 (0.7) 8 (0.5) -
Total # of infarcts 428 359 397 443 1627 -
tPA 0 min - 1 hr 1 (0.2) 0 (0.0) 0 (0.0) 1 (0.2) 1 (0.1) -
61 min - 2 hr 30 (7.0) 34 (9.5) 48 (12.1) 48 (10.8) 160 (9.8) -
121 min - 3 hr 61 (14.3) 40 (11.2) 58 (14.6) 72 (16.2) 231 (14.2) -
181 min - 4.5 hr 19 (4.4) 37 (10.3) 33 (8.3) 42 (9.5) 131 (8.1) -
271 min - 6 hr 5 (1.2) 4 (1.1) 2 (0.5) 12 (2.7) 23 (1.4) -
> 6 hr 15 (3.5) 9 (2.5) 12 (3.0) 18 (4.1) 54 (3.3) -
Received tPA (Total) 130 124 153 193 600 -
Within 2 hrs. 30 (7.24) 34 (9.5) 48 (12.1) 49 (11.1) 161 (9.9) 0.02
Within 3 hrs. 91 (21.3) 74 (20.6) 106 (26.7) 121 (27.3) 392 (24.1) 0.01
Within 4.5 hrs. 110 (25.7) 111 (30.9) 139 (35.0) 163 (36.8) 523 (32.2) <0.01
  1. * P-value is based on Chi-square test for linear trend.