Table 1

The association between the occurrence of swirl sign and different variables included in the analysis of this study
Swirl sign OR (95% CI) p-value
Negative Positive Total
Gender Male 64 (70) 27 (30) 91
Female 78 (70) 34 (30) 112 1 (0.5-2) 0.520
Diabetes mellitus Yes 17 (74) 6 (26) 23
No 125 (69) 55 (31) 180 1.3 (0.4-3.8) 0.431
Former stroke (1) Yes 30 (77) 9 (23) 39
No 111 (68) 52 (32) 163 1.6 (0.7-3.8) 0.189
Smoking (5) Yes 16 (70) 7 (30) 23
No 123 (70) 52 (30) 175 1 (0.4-2.8) 0.558
Hypertension treatment on admission (1) Yes 98 (77) 30 (23) 128
No 43 (58) 31 (42) 74 2.4 (1.2-4.6) 0.005
Acetyl salicylic acid treatment (11) Yes 22 (59) 15 (41) 37
No 112 (72) 43 (28) 155 0.6 (0.3-1.3) 0.306
Warfarin treatment (9) Yes 12 (67) 6 (33) 18
No 123 (70) 53 (30) 176 0.9 (0.3-2.7) 0.483
Platelet activator inhibitor treatment (11) Yes 25 (61) 16 (39) 41
No 109 (72) 42 (28) 151 0.6 (0.3-1.3) 0.117
Time to hospital (6) < 2 h 56 (64) 32 (36) 88
2-24 h 54 (69) 24 (31) 78
> 24 h 27 (87) 4 (13) 31 0.3 (0.1-0.9) 0.051
RLS (5) 1 80 (81) 19 (19) 99
2 – 3 41 (64) 23 (36) 64
≥ 4 16 (46) 19 (54) 35 5 (2–12,6) <0.001
Side Left 68 (67) 34 (33) 102
Right 74 (73) 27 (27) 101 0.7 (0.4-1.4) 0.192
Location Lobar 55 (67) 27 (33) 82
Deep 66 (73) 25 (27) 91
Brain stem 9 (82) 2 /18) 11
Cerebellum 11 (65) 6 (35) 17
Multiple 1(50) 1 (50) 2 0.8 (0.4-1.6) 0.745
Midline shift Yes 23 (43) 30 (57) 53
No 119 (79) 31 (21) 150 0.2 (0.1-0.4) <0.001
Intraventricular hemorrhage Yes 35 (51) 33 (49) 68
No 107 (79) 28 (21) 135 0.3 (0.1-0.6) <0.001
White matter lesions, Wahlund score 0 34 (65) 18 (35) 52
1 44 (75) 19 (25) 63
2 25 (71) 10 (29) 35
3 39 (74) 14 (26) 53 0.7 (0.3-1.7) 0.118

Figures between parentheses in the first column show the number of the missing data in each of the studied variables.

Figures between parentheses under swirl sign (column 3 and 4) show percentage.

p-values written in bold are statistically significant.

RLS reaction level scale, OR Odds ratio. 95%, CI 95% confidence interval.

Selariu et al.

Selariu et al. BMC Neurology 2012 12:109   doi:10.1186/1471-2377-12-109

Open Data