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. 2017 Oct 26;4(1):e000230. doi: 10.1136/bmjresp-2017-000230

Table 1.

Baseline characteristics of participants

Stroke patients Controls Difference (95% CI) p Value
Total number assessed 27 30
Age (years) Mean (SD) 68 (11) 58 (11) 10 (4 to 16) 0.001*
Height (cm) 169.6 (7.9) 169.7 (12.2) −0.1 (-5.6 to 5.6) 0.997*
Weight (kg) Median (IQR) 78.0 (69.0 to 86.7) 72.1 (65.0 to 80.3) 4.2 (-3.0 to 11.0) 0.182†
Body mass index (kg/m2) 27.5 (24.0 to 30.0) 25.5 (23.0 to 29.0) 1.0 (4.0 to −1.0) 0.193†
O2 saturations breathing air (%) 97 (92 to 98) 97 (95 to 98) 0 (-1 to 1) 0.660†
Smoking (pack years) 0 (0 to 20) 0 (0 to 15) 0 (0 to 5) 0.485†
Ethnicity: white European/other (N) 21/6 28/2
Proportion white European 0.78 0.93 −0.16 (−0.35 to 0.03) 0.138‡
Sex: males/females (N) 17/10 15/15
Proportion male 0.63 0.50 0.13 (−0.12 to 0.36) 0.420‡
Smoking history: ever/never smoked (N) 13/14 12/18
Proportion ever smoked 0.48 0.40 0.08 (−0.20 to 0.30) 0.599‡

*p Value calculated using unpaired t-test.

†p Value calculated using Mann-Whitney U test.

‡p Value calculated using Wilcoxon test.