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Table 2 Antibacterial treatment measures for both age groups

From: Is antibacterial treatment intensity lower in elderly patients? A retrospective cohort study in a German surgical intensive care unit

Drug class

Patients < 80 years

Patients ≥ 80 years

Exposed patients

Prescriptions

Exposed patient days

Exposed patients

Prescriptions

Exposed patient days

All antibacterials

5060 (100%a)

172,963 (100%b)

26,808 (100%a)

725 (100%a)

17,726 (100%b)

2770 (100%a)

All antibacterials except erythromycin

4673 (92.4%)

125,855 (72.8%)

22,597 (84.3%)

680 (93.8%)

14,567 (82.2%)

2477 (89.4%)

Tetracyclines

93 (1.8%)

1098 (0.6%)

631 (2.4%)

6 (0.8%)

67 (0.4%)

37 (1.3%)

Penicillins

1349 (26.7%)

63,655 (36.8%)

5640 (21.0%)

211 (29.1%)

8741 (49.3%)

806 (29.1%)

Cephalosporines

1711 (33.8%)

10,901 (6.3%)

6208 (23.2%)

248 (34.2%)

1041 (5.9%)

689 (24.9%)

Carbapenems

890 (17.6%)

14,973 (8.7%)

5787 (21.6%)

81 (11.2%)

961 (5.4%)

389 (14.0%)

Macrolides

1574 (31.1%)

47,311 (27.4%)

10,366 (38.7%)

168 (23.2%)

3183 (18.0%)

734 (26.5%)

Clarithromycin

34 (0.7%)

203 (0.1%)

124 (0.5%)

7 (1.0%)

24 (0.1%)

17 (0.6%)

Lincosamides

219 (4.3%)

966 (0.6%)

465 (1.7%)

40 (5.5%)

194 (1.1%)

95 (3.4%)

Aminoglycosides

85 (1.7%)

689 (0.4%)

361 (1.3%)

6 (0.8%)

26 (0.1%)

16 (0.6%)

Fluoroquinolones

1474 (29.1%)

13,954 (8.1%)

4950 (18.5%)

198 (27.3%)

1447 (8.2%)

556 (20.1%)

Glycopeptides

88 (1.7%)

473 (0.3%)

297 (1.1%)

9 (1.2%)

28 (0.2%)

17 (0.6%)

Imidazoles

1483 (29.3%)

12,601 (7.3%)

5297 (19.8%)

230 (31.7%)

1762 (9.9%)

768 (27.7%)

Oxazolidinones

493 (9.7%)

5771 (3.3%)

3163 (11.8%)

36 (5.0%)

251 (1.4%)

147 (5.3%)

  1. aSum of proportions of antibacterial classes exceeds 100% as patients could have been exposed to more than one class
  2. bSum of prescriptions is slightly lower than 100% as some rarely used antibacterials were not analysed as separate classes, see methods section for details