Table 1 CMS score summary

Prevalences (n = 1029)

585

315

93

36

Percentage

56.85%

30.61%

9.04%

3.50%

Hb Mean ± SD (g/L)

191.00 ± 15.01

199.47 ± 20.22

210.41 ± 22.64

217.81 ± 29.95

Hb range (g/L)

146.0-247.0

153.5-269.0

161.5-282.5

167.5-267.5

Hb (g/L) — no. (%)

< 210 (n = 782)

521 (66.62)

214 (27.37)

36 (4.60)

11 (1.41)

≥ 210 (n = 247)

64 (25.91)

101 (40.89)

57 (23.08)

25 (10.12)

Breathlessness/Palpitations — no. (%)

0 (n = 442)

376 (85.07)

55 (12.44)

10 (2.26)

1 (0.23)

1 (n = 458)

196 (42.79)

211 (46.07)

44 (9.61)

7 (1.53)

2 (n = 114)

13 (11.40)

46 (40.35)

37 (32.46)

18 (15.79)

3 (n = 15)

0 (0.00)

3 (20.00)

2 (13.33)

10 (66.67)

Sleep disturbance — no. (%)

0 (n = 467)

400 (85.65)

56 (11.99)

11 (2.36)

0 (0.00)

1 (n = 361)

150 (41.55)

176 (48.75)

32 (8.86)

3 (0.83)

2 (n = 166)

33 (19.88)

76 (45.78)

39 (23.49)

18 (10.84)

3 (n = 35)

2 (5.71)

7 (20.00)

11 (31.43)

15 (42.86)

Cyanosis — no. (%)

0 (n = 441)

384 (87.07)

54 (12.24)

2 (0.45)

1 (0.23)

1 (n = 347)

159 (45.82)

162 (46.69)

24 (6.92)

2 (0.58)

2 (n = 160)

31 (19.38)

71 (44.38)

46 (28.75)

12 (7.50)

3 (n = 81)

11 (13.58)

28 (34.57)

21 (25.93)

21 (25.93)

Dilatation of veins — no. (%)

0 (n = 793)

548 (69.10)

212 (26.73)

28 (3.53)

5 (0.63)

1 (n = 161)

31 (19.25)

84 (52.17)

38 (23.60)

8 (4.97)

2 (n = 58)

5 (8.62)

15 (25.86)

22 (37.93)

16 (27.59)

3 (n = 17)

1 (5.88)

4 (23.53)

5 (29.41)

7 (41.18)

Paresthesia — no. (%)

0 (n = 518)

446 (86.10)

69 (13.32)

2 (0.39)

1 (0.19)

1 (n = 355)

129 (36.34)

178 (50.14)

44 (12.39)

4 (1.13)

2 (n = 119)

8 (6.72)

58 (48.74)

37 (31.09)

16 (13.45)

3 (n = 37)

2 (5.41)

10 (27.03)

10 (27.03)

15 (40.54)

Headache — no. (%)

0 (n = 435)

382 (87.82)

50 (11.49)

3 (0.69)

0 (0.00)

1 (n = 431)

190 (44.08)

194 (45.01)

44 (10.21)

3 (0.70)

2 (n = 130)

13 (10.00)

65 (50.00)

34 (26.15)

18 (13.85)

3 (n = 33)

0 (0.00)

6 (18.18)

12 (36.36)

15 (45.45)

Tinnitus — no. (%)

0 (n = 596)

482 (80.87)

101 (16.95)

12 (2.01)

1 (0.17)

1 (n = 336)

98 (29.17)

175 (52.08)

55 (16.37)

8 (2.38)

2 (n = 77)

5 (6.49)

33 (42.86)

23 (29.87)

16 (20.78)

3 (n = 20)

0 (0.00)

6 (30.00)

3 (15.00)

11 (55.00)