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Table 1 Baseline demographic and clinical details

From: Mechanical thrombectomy: can it be safely delivered out of hours in the UK?

 

Total (n = 501)

In-hours (n = 211)

Out-of-hours (n = 290)

p value*

Age: mean (SD)

66.7 (13.7)

68.6 (12.6)

65.3 (14.2)

0.008

Sex: n (%) males

262 (52.3)

100 (47.4)

162 (55.9)

0.061

Hypertension: n (%)

252 (50.3)

93 (54.8)

159 (44.1)

0.017

Atrial fibrillation: n (%)

140 (27.9)

56 (26.5)

84 (29.0)

0.550

Hyperlipidaemia: n (%)

134 (26.7)

56 (26.5)

78 (26.9)

0.929

Diabetes: n (%)

80 (16.0)

29 (13.7)

51 (17.6)

0.246

Previous stroke/TIA: n (%)

76 (15.2)

31 (14.7)

45 (15.5)

0.799

Coma pre procedure: n (%)

17 (3.4)

7 (3.3)

10 (3.4)

0.936

Thrombolysis: n (%)

368 (73.5)

155 (73.5)

213 (73.4)

0.998

NIHSS at onset: median; mean (SD)

18.0; 18.3 (7.0)

18.0; 18.1 (7.1)

18.0; 18.4 (6.9)

0.718

Anterior circulation lesion: n (%)

447 (89.2)

189 (89.6)

258 (89.0)

0.828**

 CCA: n (%)

6 (1.2)

4 (1.9)

2 (0.7)

 

 ICA: n (%)

158 (31.5)

64 (30.3)

94 (32.4)

 

 ACA: n (%)

1 (0.2)

1 (0.5)

0 (0.0)

 

 M1: n (%)

239 (47.7)

98 (46.4)

141 (48.6)

 

 M2: n (%)

37 (7.4)

19 (9.0)

18 (6.2)

 

 M3: n (%)

6 (1.2)

3 (1.4)

3 (1.0)

 

Posterior circulation lesion: n (%)

54 (10.8)

22 (10.4)

32 (11.0)

 

 Vertebral artery: n (%)

4 (0.8)

2 (0.9)

2 (0.7)

 

 Basilar artery: n (%)

47 (9.4)

18 (8.5)

29 (10.0)

 

 PCA: n (%)

3 (0.6)

2 (0.9)

1 (0.3)

 
  1. ACA anterior cerebral artery, CCA common carotid artery, ICA internal carotid artery, TIA transient ischaemic attack, M1, M2, M3 middle cerebral artery segments 1, 2 and 3, NIHSS National Institutes for Health Stroke Scale, PCA posterior cerebral artery, SD standard deviation
  2. * p values are derived from an unrelated t test for continuous variables and a Pearson chi-square test for nominal variables
  3. ** p value for a comparison across groups of anterior versus posterior circulation lesions