Table 2. Potential predictors of levels of antibody to LukF and LukS.
| Antibody to LukF | Antibody to LukS | |||||
|---|---|---|---|---|---|---|
| Mean antibody to LukF (ng/mL) (SEM)a |
Mean antibody to LukS (ng/mL) (SEM) |
|||||
| Predictor | Univariate p-value† |
Multivariate p-value‡ |
Univariate p-value† |
Multivariate p-value‡ |
||
| Age | - | 0.064 | 0.052 | - | 0.013 | 0.021 |
| Day of Illness | - | 0.700 | 0.472 | - | 0.937 | 0.409 |
|
Prior MRSA or
SSTI |
0.036 | 0.011 | 0.006 | 0.002 | ||
| Yes | 25,598 (9,050) |
13,426 (4,465) |
||||
| No | 12,415 (7,908) |
10,242 (6,639) |
||||
| Unknown | 28,254 (25,050) |
35,076 (28,597) |
||||
|
MRSA/SSTI
Contact |
0.295 | - | 0.222 | - | ||
| Yes | 17,238 (9,367) |
8,613 (4,495) |
||||
| No | 17,723 (12,463) |
15,128 (10,455) |
||||
| Unknown | 19,335 (7,669) |
14,556 (6,430) |
||||
|
Disease
Category |
0.229 | 0.534 | ||||
| SSTI | 12,444 (3,839) |
6,736 (1,950) |
0.829 | 0.687 | ||
| Invasive | 28,986 (15,025) |
25,379 (12,500) |
||||
| PVL | 0.058 | 0.074 | 0.515 | 0.236 | ||
| Positive | 21,562 (7,264) |
15,642 (5,794) |
||||
| Negative | 5,753 (3,520) |
4,285 (1,944) |
||||
I
Standard error of the mean
†
p-value calculated using logistic regression with single variable.
‡
p-value calculated using logistic regression controlling for age, day of illness, prior MRSA or SSTI, disease category and PVL status of isolate