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Table 1 The demographic characteristics of patients with COVID-19

From: Anemia predicts poor outcomes of COVID-19 in hospitalized patients: a prospective study in Iran

Demographic variables

Total (n = 1274)

No-Anemia (n = 659)

Anemia

(n = 615)

p-value

Age (years) Mean ± SD

64.43 ± 17.16

62.39 ± 17.15

64.53 ± 17.12

0.02

Sex,

Males n (%)

706 (55.41)

384 (58.27)

322 (52.35)

0.03

Females n (%)

568 (44.59)

275 (41.73)

293 (47.65)

 

Smoking n (%)

74 (5.80)

40 (6.06)

34 (5.52)

0.74

Comorbidities n (%)

CVD

435 (34.14)

138 (20.94)

297 (48.29)

0.03

Respiratory diseases

171 (13.42)

89 (13.50)

82 (13.33)

0.9

HTN

504 (39.56)

244 (37.02)

260 (42.27)

0.03

Kidney diseases

112 (8.79)

26 (3.94)

86 (13.98)

< 0.001

Diabetes

288 (22.60)

121 (18.36)

167 (27.15)

< 0.001

Carcinoma

59 (4.63)

11 (1.66)

48 (7.80)

< 0.001

Liver diseases

24 (1.88)

13 (1.97)

11 (1.78)

0.85

Autoimmune diseases

14 (1.09)

4 (0.6)

10 (1.62)

0.07

BMI categories n (%)

   

0.02

Underweight (BMI < 18.5 kg/m2)

420 (32.96)

196 (29.7)

224 (36.4)

 

Normal weight (BMI: 18.5–25 kg/m2)

528 (41.44)

287 (43.5)

241 (39.1)

 

Overweight/Obese (BMI > 25 kg/m2)

326 (25.5)

176 (26.7)

150 (24.3)

 

hs-CRP (mg/l)

4.01 ± 8.61

4.15 ± 9.77

3.85 ± 7.29

0.84

Severe disease n (%)

67 (5.25)

23 (3.49)

38 (6.17)

0.01

Temperature (°C)

36.83 ± 4.13

36.92 ± 3.55

36.67 ± 4.91

0.54

Hypoxia n (%)

466 (36.57)

242 (36.72)

224 (36.42)

0.81

  1. CVD Cardiovascular disease, HTN Hypertension, BMI Body mass index, hs-CRP high sensitive C-Reactive protein
  2. *p-value of independent t-test
  3. **p-value of chi-square test