Table 3. Population Demographics.

	No stroke			Ischaemic stroke			Total			Mann Whitney
	N	median	mean	N	median	mean	N	median	mean	p value
Ischaemic stroke	436	0	0	61	1	1	497	0	0.12	—
Age (yr)	436	46	46.4	61	51	51.5	497	47	47.0	0.025
Gender (% female)	436	1	0.60	61	1	0.69	497	1	0.61	0.17
Smoking	436	0	0.37	61	0	0.38	497	0	0.37	0.94
Hypertension	434	0	0.14	61	0	0.21	495	0	0.15	0.15
Venous thromboemboli	436	0	0.053	61	0	0.049	497	0	0.052	0.91
Diabetes mellitus	436	0	0.011	61	0	0.033	497	0	0.014	0.19
Atrial fibrillation or arrythmia	436	0	0.014	61	0	0.016	497	0	0.014	0.87
Hypercholesterolemia	435	0	0.016	61	0	0.016	496	0	0.016	0.97
Ischaemic heart disease	436	0	0.0046	61	0	0.049	497	0	0.01	0.0011
Myocardial or valvular disease	436	0	0.0092	61	0	0	497	0	0.008	0.45
High output cardiac failure	436	0	0.0046	61	0	0	497	0	0.004	0.6
Brain abscess	436	0	0.096	61	0	0.098	497	0	0.10	0.96
Migraines	435	0	0.35	61	0	0.33	496	0	0.35	0.74
Ever transfused (%)	430	0	0.081	57	0	0.12	487	0	0.086	0.3
On iron treatment (oral)	431	0	0.27	58	0	0.36	489	0	0.28	0.14
Ever used intravenous iron	425	0	0.033	57	0	0.053	482	0	0.035	0.45
Ever used tranexamic acid	425	0	0.028	57	0	0.035	482	0	0.029	0.77
Ever used hormones	423	0	0.10	57	0	0.16	480	0	0.11	0.22
Oxygen saturation (SaO2, %)	414	95	92.9	57	94	91.8	471	94.8	92.7	0.28
Hemoglobin (g/dl)	404	14.2	15.4	60	13.8	17.5	464	14.1	15.7	0.25
Platelets (x109/dl)	405	267	275.5	60	272.5	284.8	465	268	276.7	0.57
Serum iron (µmol/L)	364	12	13.7	55	9	10.7	419	12	13.3	0.025
Serum transferrin saturation index, TfSI(%)	364	20	21.7	56	15	18.4	420	19	21.2	0.094
Ferritin (µg/L)	214	29.5	49.5	28	34.5	49.8	242	30	49.6	0.55
C-reactive protein, CRP (iu/ml)	275	2	3.49	35	2	7.25	310	2	3.91	0.59
Prothrombin time, PT (s)	385	10.7	10.9	54	10.5	11.2	439	10.7	11.0	0.08
Activated partial thromboplastin time, APTT (s)	381	26	26.1	54	25.65	25.8	435	26	26.1	0.27
Thrombin time, TT (s)	369	14.6	14.6	52	15	15.1	421	15	14.7	0.07
Fibrinogen (g/L)	381	3.03	3.11	58	3.34	3.48	439	3.07	3.16	0.013
Factor VIII:Ag, FVIII (iu/ml)	240	1.50	1.63	40	1.73	1.87	280	1.52	1.66	0.07
Von Willebrand Factor, VWF (iu/ml)	177	1.01	1.25	25	1.1	3.00	202	1.025	1.47	0.36
Pulmonary artery pressure (systolic), PAP, mmHg	217	23	24.1	45	23	24.1	262	23	24.1	0.69
Pulmonary artery pressure (diastolic), PAP, mmHg	217	8	8.2	45	7	7.82	262	7	8.16	0.63
Pulmonary artery pressure (mean), PAP, mmHg	214	14	14.5	45	13	14.0	259	14	14.4	0.51
Series Indicator	436	2	1.8	61	1	1.63	497	2	1.75	0.13

Demographics of individual and combined series, with p values calculated by Mann Whitney. N, number of recordings of variable in series.