Table 1 Baseline demographic and clinical characteristics of confirmed Middle East respiratory syndrome cases reported between September 2012 and June 2020

Number of confirmed cases

2450

2048

186

93

123

Annual incidence (/10⁷)

0.45

94.34

4.71

14.07

0.023

Female

751 (30.7)

626 (30.6)

75 (40.3)

20 (21.5)

30 (24.4)

Age, years (median, IQR)

53 (38–65)

53 (38–65)

55 (42–66)

43 (33–59)

52 (38–65)

Number of case cluster

150

123

1

11

15

Number of deaths (CFR, %)

802 (32.7)

718 (35.1)

35 (18.8)

15 (16.1)

34 (27.6)

Contact history

 Animals

356 (14.5)

310 (15.1)

0

16 (17.2)

30 (24.4)

 Patients

1097 (44.8)

820 (40.1)

184 (98.9)

47 (50.5)

46 (37.4)

 Unknown

997 (40.7)

918 (44.8)

2 (1.1)

30 (32.3)

47 (38.2)

Occupation

 Healthcare worker

335 (13.7)

265 (12.9)

30 (16.1)

26 (28.0)

14 (11.4)

 Others

2115 (86.3)

1783 (87.1)

156 (83.9)

67 (72.0)

109 (88.6)

Exposure site

 Hospital

724 (29.6)

496 (24.2)

185 (99.5)

21 (22.6)

22 (17.9)

 Household

120 (4.9)

93 (4.5)

0

11 (11.8)

16 (13.0)

 Others

1606 (65.5)

1459 (71.3)

1 (0.5)

61 (65.6)

85 (69.1)

Asymptomatic infection

201 (8.2)

173 (8.5)

0

19 (20.4)

9 (7.3)

Underlying condition

1272 (51.9)

1156 (56.5)

20 (10.8)

38 (40.9)

58 (47.2)

Time from disease onset to diagnosis, days (median, IQR)

5 (3–8)

5 (3–8)

4 (2–8)

8 (6–14)

8 (5–13.5)

Time from disease onset to death, days (median, IQR)

11 (7–17)

10 (6–16)

12 (9–16)

21.5 (18–27)

16 (11–20)

Year of occurrence

 2012

9 (0.4)

5 (0.2)

0

0

4 (3.3)

 2013

169 (6.9)

137 (6.7)

0

12 (12.9)

20 (16.3)

 2014

652 (26.6)

560 (27.3)

0

59 (63.3)

33 (26.8)

 2015

680 (27.8)

457 (22.3)

185 (99.5)

7 (7.5)

31 (25.2)

 2016

254 (10.4)

242 (11.8)

0

3 (3.2)

9 (7.3)

 2017

250 (10.2)

237 (11.6)

0

7 (7.5)

6 (4.9)

 2018

150 (6.1)

145 (7.1)

1 (0.5)

1 (1.2)

3 (2.4)

 2019

226 (9.2)

208 (10.2)

0

2 (2.2)

16 (13.0)

 2020

60 (2.4)

57 (2.8)

0

2 (2.2)

1 (0.8)