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Table 3 Comparison of adverse events (AE) between study groups after 1 month of follow-up

From: Pre-exposure prophylaxis with hydroxychloroquine for COVID-19: a double-blind, placebo-controlled randomized clinical trial

 

Placebo

(n = 127)

Hydroxychloroquine (n=142)

 
 

n

%

n

%

p value

At least 1 adverse event

42

33.1

53

37.3

0.548

Syndromic approach

 

  General symptoms

9

7.7

10

7.0

> 0.999

   Fever

6

4.7

4

2.8

0.553

   Chills

0

0.0

2

1.4

0.552

   Sweating

0

0.0

0

0.0

 

   Malaise

4

3.1

4

2.8

> 0.999

   Myalgia

2

1.6

3

2.1

> 0.999

   Arthralgia

0

0.0

0

0.0

 

  Gastrointestinal symptoms

20

15.7

39

27.4

0.041

   Nausea

3

2.4

10

7.0

0.160

   Abdominal pain

11

8.3

15

10.9

0.825

   Diarrhea

8

6.3

24

16.9

0.028

   Dysgeusia

0

0.0

0

0.0

 

  Dermatological symptoms

2

1.6

3

2.2

> 0.999

   Itching

0

0.0

2

1.4

0.546

   Rash

2

1.6

2

1.4

> 0.999

  Respiratory symptoms

9

7.1

5

3.7

0.257

   Rhinorrea

3

2.4

0

0.0

0.190

   Sore throat/odynophagia

5

3.9

3

2.2

0.556

   Cough

3

2.4

2

1.5

0.851

   Pleuritic pain

0

0.0

0

0.0

 

   Dyspnea

0

0.0

0

0.0

 

  Neurological symptoms

12

9.4

14

9.9

> 0.999

   Headache

12

9.4

13

9.1

0.987

   Visual disturbances

0

0.0

1

0.7

>0.999

  Cardiovascular symptoms

2

1.6

2

1.4

0.999

  Other symptoms

10

8.0

7

4.9

0.427

Severity

    

0.249

  Mild

43

33.8

63

44.4

 

  Moderate

3

2.4

1

0.7

 

  Severe

0

0.0

0

0.0

 

Potential relationship with the study drug

     

  Related (at least one AE)

33

26.0

49

34.5

0.206

  Non related (at least one AE)

17

13.4

14

9.9

0.476

Withdrawal due to AE

5

3.9

1

0.7

0.270

  1. % according to available data