Table 1.
Baseline after patient matching at NI pathogens level
| Variable | All NIs | E coli | KP | SA | PA |
|---|---|---|---|---|---|
| Case group | |||||
| Matched no. | 1,858 | 169 | 54 | 97 | 64 |
| Unmatched no. | 257 | 8 | 1 | 1 | 14 |
| Control group | |||||
| Matched no. | 1,858 | 169 | 54 | 97 | 64 |
| Unmatched no. | 136,207 | 64,650 | 22,575 | 57,869 | 24,498 |
| Age (mean (SD)) | |||||
| Case group | 43.8(21.6) | 39.8(19.4) | 50.3(18.9) | 33.9(23.3) | 46.6(21.1) |
| Control group | 43.0(20.6) | 39.0(18.9) | 53.1(19.7) | 34.4(23.8) | 48.8(20.4) |
| p-value | 0.225 | 0.72 | 0.452 | 0.882 | 0.554 |
| Female (%) | |||||
| Case group | 753(40.5) | 100(59.2) | 21(38.9) | 34(35.1) | 14(21.9) |
| Control group | 762(41.0) | 97(57.4) | 24(44.4) | 33(34.0) | 14(21.9) |
| p-value | 0.789 | 0.825 | 0.696 | 1 | 1 |
| Operation (%) | |||||
| Case group | 1,064(57.3) | 117(69.2) | 25(46.3) | 51(52.6) | 40(62.5) |
| Control group | 1,071(57.6) | 119(70.4) | 30(55.6) | 53(54.6) | 39(60.9) |
| p-value | 0.842 | 0.906 | 0.441 | 0.886 | 1 |
| IMV (%) | |||||
| Case group | 279(15.0) | 8(4.7) | 14(25.9) | 11(11.3) | 21(32.8) |
| Control group | 266(14.3) | 8(4.7) | 12(22.2) | 10(10.3) | 21(32.8) |
| p-value | 0.578 | 1 | 0.822 | 1 | 1 |
| CVC (%) | |||||
| Case group | 423(22.8) | 24(14.2) | 23(42.6) | 15(15.5) | 22(34.4) |
| Control group | 418(22.5) | 22(13.0) | 19(35.2) | 14(14.4) | 20(31.2) |
| p-value | 0.875 | 0.874 | 0.554 | 1 | 0.851 |
| IC (%) | |||||
| Case group | 934(50.3) | 101(59.8) | 37(68.5) | 30(30.9) | 33(51.6) |
| Control group | 925(49.8) | 99(58.6) | 34(63.0) | 29(29.9) | 28(43.8) |
| p-value | 0.793 | 0.912 | 0.685 | 1 | 0.479 |
Abbreviations: CVC, central venous catheterization; E. coli, Escherichia coli; IC, indwelling catheter; IMV, invasive mechanical ventilation; KP, Klebsiella pneumoniae; NI, nosocomial infection; no., number; PA, Pseudomonas aeruginosa; SA, Staphylococcus aureus; SD, standard deviation.