Table 3.
Number of samples and patients tested (total and proportion positive) per year and annual incidences of hospital-acquired C. difficile infections (CDI) in IRCCS AOU San Martino–IST of Genoa, Italy
| Year | No. of tested samples | No. of CDI episodes | No. of severe CDI episodes (%) | No. of unique patients with CDI | Positive patients/tested patients (%) | Incidence/10000 patient-days (95% CI) (ward where the diagnosis of CDI was made) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | ICU | Medical wards | Hemato-oncological wards | Rehabilitation wards | Surgical wards | ||||||
| 2010 | 289 | 19 | 7/19 (36·8) | 19 | 19/227 (8·4) | 0·54 (0·35–0·85) |
2·38 (0·77–7·37) |
0·49 (0·24–0·97) |
0·44 (0·06–3·15) |
2·26 (0·85–6·03) |
0·32 (0·10–0·99) |
| 2011 | 455 | 32 | 5/32 (15·6) | 32 | 32/375 (8·5) | 0·66 (0·47–0·93) |
− | 1·12 (0·75–1·67) |
0·28 (0·04–1·96) |
1·80 (0·81–4·00) |
0·08 (0·01–0·54) |
| 2012 | 700 | 74 | 17/74 (23·0) | 74 | 74/551 (13·4) | 1·56 (1·24–1·96) |
1·69 (0·55–5·25) |
2·04 (1·51–2·76) |
2·01 (0·96–4·21) |
4·40 (2·84–6·82) |
0·16 (0·04–0·65) |
| 2013 | 1156 | 127 | 21/127 (16·5) | 125 | 125/801 (15·6) | 2·76 (2·32–3·28) |
2·14 (0·80–5·69) |
2·68 (2·04–3·53) |
1·20 (0·45–3·19) |
10·01 (7·82–12·81) |
0·44 (0·18–1·05) |
| 2014 | 1352 | 136 | 23/136 (16·9) | 131 | 131/937 (14·0) | 3·04 (2·57–3·60) |
0·51 (0·07–3·61) |
3·88 (3·09–4·88) |
3·55 (2·10–5·99) |
8·04 (5·92–10·92) |
0·66 (0·31–1·37) |
| χ2 for trend (P value) | − | − | <0·05 | − | 0·002 | <0·001 | 0·61 | <0·001 | 0·001 | <0·001 | 0·05 |
CI, Confidence interval.