Table 1 The characteristics of RCTs included in the meta-analysis.

From: Hydroxychloroquine plus standard of care compared with standard of care alone in COVID-19: a meta-analysis of randomized controlled trials

Author, year

Place

Patients (N, male)

Age

Diagnosis

Intervention (N, HCQ protocol)

SOC (N, protocol)

Jadad scale

Abd-Elsalam, 2020

Egypt

194,118

40.72

PCR

97; 400 mg twice/day (in day 1) followed by 200 mg tablets twice/day + SOC

97; Paracetamol, oxygen, fluids, empiric antibiotic, oseltamivir, and invasive mechanical ventilation

3

Chen Z, 2020

China

62, 29

44.7

RT-PCR

31; (400 mg/day (200 mg/bid) between days 1 and 5) + SOC

31; Oxygen therapy, antiviral and antibacterial agents, immunoglobulin, corticosteroids

2

Chen J, 2020

China

30, 21

48.6

PCR

15; (400 mg per day for 5 days) + SOC

15; O2 therapy, interferon, lopinavir/ ritonavir, antibiotics, and supportive treatment

2

Chen CP, 2020

Taiwan

33, 19

32.9

RT-PCR

21; HCQ 400 mg twice for 1 day and HCQ 200 mg twice daily for 6 days + SOC

12; Ceftriaxone, azithromycin, levofloxacin, moxifloxacin, Oseltamivir

2

Chen L, 2020

China

66, 15

NR

RT-PCR or CT

18; 200 mg Bid for 10 days

12; NR

3

Cavalcanti, 2020

Brazil

504, 265

50.3

NR

221; HCQ 400 mg twice daily, for 7 days + SOC

227; Glucocorticoids, immunomodulators, antibiotic and antiviral agents

4

Kamran, 2020

Pakistan

500,466

35.96

PCR

349; HCQ 400 mg twice a day for day one followed by 200 mg 12 hourly for next 5 days + SOC

151; Vit C, zinc, Vit-D, Paracetamol, intravenous fluids, hemodynamic monitoring parameters

3

Lyngbakken, 2020

Norway

53, 35

62

RT-PCR

27; HCQ 400 mg twice for 7 days + SOC

26; NR

2

RC Group,2020

UK

4716, 2935

NR

NR

1561; 800 mg at 0 and 6 h; 400 mg at 12 h; 400 mg × 9 days + SOC

3155; NR

2

Tang, 2020

China

150, 82

46

Real time

RT-PCR

75; HCQ 1200 mg/day × 3  day followed by 800/day + SOC

75; Intravenous fluids, supplemental oxygen, , hemodynamic monitoring, and intensive care

3

WHO Solidarity Trial, 2021

30 Countries

1853,1109

NR

NR

947,800 mg at 0 and hour 6, starting at hour 12, 800 mg for 10 days

906; NR

2

  1. CT: Computed tomography, HCQ: Hydroxychloroquine, NR: Not reported, PCR: Polymerase chain reaction, RT-PCR: Reverse transcription polymerase chain reaction.