Table 1 Baseline characteristics of Acinetobacter baumannii complex isolates analysed in this study

Patient visits

Outpatient clinics

12,169

Hospitals

26,840

Total number of isolates

43,948

100

1,856

4.2

42,092

95.8

2014

3437

7.82

261

14.06

3176

7.55

2015

7660

17.43

411

22.14

7249

17.22

2016

10,139

23.07

334

18.00

9805

23.29

2017

11,794

26.84

470

25.32

11,324

26.90

2018

10,918

24.84

380

20.47

10,538

25.04

Care setting type

Outpatient clinics

13,081

29.76

171

9.21

12,910

30.67

Secondary care hospitals

15,853

36.07

781

42.08

15,072

35.81

Tertiary care hospitals

13,022

29.63

769

41.43

12,253

29.11

Specialist care hospitals

1335

3.04

96

5.17

1239

2.94

Prevention and rehabilitation care centres

390

0.89

34

1.83

356

0.85

Other hospitals

115

0.26

1

0.05

114

0.27

Unknown hospital type

152

0.35

4

0.22

148

0.35

German region

Southeast

9327

21.22

199

10.72

9128

21.69

Southwest

8,819

20.07

245

13.20

8,574

20.37

West

14,945

34.01

959

51.67

13,986

33.23

Northwest

5490

12.49

332

17.89

5158

12.25

Northeast

4689

10.67

116

6.25

4573

10.86

NA

678

1.54

5

0.27

673

1.60

Patient gender

Female

15,884

36.1

445

23.98

15,439

36.68

Male

19,962

45.42

1187

63.95

18,775

44.60

NA

8102

18.44

224

12.07

7878

18.72

Sex ratio

0.84

0.45

0.86

Patient age

< 1 year

1651

3.76

8

0.43

1643

3.90

1–19 years

2844

6.47

34

1.83

2810

6.68

20–39 years

3106

7.07

208

11.21

2898

6.88

40–59 years

7203

16.39

417

22.47

6786

16.12

60–79 years

18,496

42.09

989

53.29

17,507

41.59

≥ 80 years

10,608

24.14

199

10.72

10,409

24.73

NA

40

0.09

1

0.05

39

0.09

Age (median, IQR)

69 (52–79)

66 (53–75)

69 (52–79)

Clinical specimen material

Upper respiratory

4107

9.35

166

8.94

3941

9.36

Lower respiratory

3496

7.95

400

21.55

3096

7.36

Other respiratory

443

1.01

41

2.21

402

0.96

Blood

997

2.27

81

4.36

916

2.18

Wound

12,254

27.88

342

18.43

11,912

28.30

Urine

8887

20.22

203

10.94

8684

20.63

Other

13,659

31.08

619

33.35

13,040

30.98

NA

105

0.24

4

0.22

101

0.24