Similarity of patient characteristics and outcomes in consecutive data collection on stroke admissions over one month compared to longer periods

Table 2 **Comparison of stroke outcomes in patients admitted between one month* and over 2 years and during autumn, winter and summer months* admitted to the eight NHS Trusts in the East of England**

Variables	Oct 2009 cohort (n = 308)	Full cohort (n = 8398)^†		Autumn cohort (n = 2184)^†		Winter cohort (n = 3478)^†		Summer cohort (n = 2736)^†
Variables	Oct 2009 cohort (n = 308)	Results^‡	p-value^§vs. Oct 2009	Result^‡	p-value^§vs. Oct 2009	Result^‡	p-value^§vs. Oct 2009	Result^‡	p-value^§vs. Oct 2009
Death			0.13		0.10		0.25		0.09
Yes	62 (20)	1414 (17)		357 (16)		609 (18)		448 (16)
No	246 (80)	6984 (83)		1827 (84)		2869 (82)		2288 (84)
Likelihood of death Unadjusted OR	1.00	0.80 (0.60-1.07) N = 8706	0.13	0.78 (0.57-1.04) N = 2492	0.10	0.84 (0.63-1.13) N = 3786	0.25	0.78 (0.58-1.04) N = 3044	0.10
Adjusted OR^¥	1.00	0.85 (0.60-1.22) N = 4877	0.39	0.88 (0.60-1.28) N = 1613	0.49	0.93 (0.64-1.34) N = 2078	0.70	0.76 (0.52-1.12) N = 1620	0.17
Discharge residence			0.21
Home	165 (71)	4115 (67)		1082 (66)	0.19	1701 (69)	0.33	1332 (66)	0.13
Care home	24 (10)	884 (14)		238 (15)		341 (14)		305 (15)
Other	44 (19)	1133 (18)		318 (19)		440 (18)		375 (19)

*October 2009.
**December 2008 to April 2011 excluding October 2009.
***August-Novembers 2009, and 2010 excluding October 2009.
^†The October 2009 data was excluded.
^‡Results reported as mean (standard deviation) and median (interquartile range) for continuous variables and number (%) for categorical data.
^§Chi² test for categorical data. Statistical difference performed on complete data only.
^¥Logistic regression adjusted for age, gender and pre-stroke Rankin. Odds ratios and corresponding 95% confidence intervals are reported.

ISSN: 1756-0500