Table 5. Univariate and multivariate linear correlation analyses between surgery and complications (dependence variables) with independence variables such as MRSA, MSSA, Streptococci, VSE, CoNS, MR-CoNS, MDR E. coli, VRE, Candida albicans, Neisseria elongata subsp. nitroreducens, Brucella spp., and Propionibacterium acnes.
* = significant test; R = Pearson’s linear correlation coefficient; R_partial = the partial correlation coefficient is the coefficient of correlation of the variable with the dependent variable, adjusted for the effect of the other variables in the mode; MRSA = methicillin-resistant Staphylococcus; MSSA = methicillin-sensitive Staphylococcus aureus; MR-CoNS = methicillin-resistant coagulase-negative Staphylococci resistant; VSE = vancomycin-susceptible Enterococcus spp; N el. Subsp. Nitr. = Neisseria elongata subsp. nitroreducens
| Linear correlation analysis | Univariate analysis R (p-value) | Multivariate analysis (Rpartial; p-value) |
| Multiple linear correlation coefficient = 0.983 | ||
| Complications / MRSA | -0.07 (0.608) | Rpartial = -0.741; p-value < 0.0001 * |
| Complications / MSSA | 0.54 (<0.0001) * | Rpartial = -0.555.; p-value = 0.0001 * |
| Complications / Streptococci | 0.01 (0.934) | Rpartial = -0.663; p-value < 0.0001 * |
| Complications / VSE | 0.04 (0.785) | Rpartial = -0.247; p-value = 0.103 |
| Complications / CoNS | -0.04 (0.759) | Rpartial = -0.261; p-value = 0.083 |
| Complications / MR-CoNS | 0.022 (0.873) | Rpartial = -0.894; p-value < 0.0001 * |
| Complications / MDR E.coli | 0.242 (0.072) | Rpartial = -0.339; p-value = 0.0229 * |
| Complications / VRE | 0.022 (0.872) | Rpartial = -0.456; p-value = 0.0016* |
| Complications / Brucella meliensis Brucella spp. | 0.339 (0.0106) * | Rpartial = -0.102; p-value = 0.505 |
| Complications / Candida albicans | -0.727 (< 0.0001) * | Rpartial = -0.910; p-value < 0.0001 * |
| Complications / Neisseria elongata subsp | 0.03 (0.856) | Rpartial = -0.115; p-value = 0.451 |
| Complications / Propionibacterium acnes | 0.024 (0.860) | Rpartial = -0.845; p-value < 0.0001 * |
| Multiple linear correlation coefficient = 0.921 | ||
| Surgery / MRSA | 0.287 (0.0323) * | Rpartial = -0.210; p-value = 0.167 |
| Surgery / MSSA | 0.004 (0.977) | Rpartial = -0.403; p-value = 0.006 * |
| Surgery / Streptococci | 0.394 (0.0027) * | Rpartial = -0.205; p-value = 0.177 |
| Surgery / VSE | 0.256 (0.057) | Rpartial = -0.03; p-value = 0.844 |
| Surgery / CoNS | 0.286 (0.0325) * | Rpartial = -0.176; p-value = 0.289 |
| Surgery / MR-CoNS | 0.034 (0.802) | Rpartial = -0.339; p-value = 0.0227 * |
| Surgery / MDR E.coli | -0.275 (0.0406) | Rpartial = -0.394; p-value = 0.0075 * |
| Surgery / VRE | 0.350 (0.0083) * | Rpartial = -0.04; p-value = 0.806 |
| Surgery / Brucella meliensis | 0.285 (0.0336) * | Rpartial = 0.60; p-value < 0.0001 * |
| Surgery / Candida albicans | -0.674 (< 0.0001) * | Rpartial = -0.576; p-value < 0.0001 * |
| Surgery / N el. Subsp. Nitr. | 0.10 (0.477) | Rpartial = 0.03; p-value = 0.869 |
| Surgery / Propioni bacterium acnes | -0.119 (0.385) | Rpartial = -0.519; p-value = 0.0003 * |