Table 3. Selected characteristics of patients with injection drug use–related methicillin-resistant Staphylococcus aureus bloodstream infections, by onset type, Tennessee, USA, 2015–2017*.
| Characteristic | MRSA onset |
p value | Overall | ||
|---|---|---|---|---|---|
| CO-ED | CO-IP | HO | |||
| Total |
1,156 (62.9) |
572 (31.1) |
111 (6.0) |
<0.001 |
1,839 (100) |
| Onset year | <0.001 | ||||
| 2015 | 192 (51.2) | 153 (40.8) | 30 (8.0) | 375 (20.4) | |
| 2016 | 393 (61.1) | 211 (32.8) | 39 (6.1) | 643 (35.0) | |
| 2017 |
571 (69.5) |
208 (25.3) |
42 (5.1) |
|
821 (44.6) |
| Age range, y | <0.001 | ||||
| 13–17 | 0 | 1 (0.2) | 0 | 1 (0.0) | |
| 18–34 | 431 (37.3) | 164 (28.7) | 22 (19.8) | 617 (33.6) | |
| 35–49 | 405 (35.0) | 226 (39.5) | 34 (30.6) | 665 (36.2) | |
| 50–64 | 245 (21.2) | 149 (26.0) | 42 (37.8) | 436 (23.7) | |
| >65 | 75 (6.5) | 32 (5.6) | 13 (11.7) | 120 (6.5) | |
| Median (Q1–Q3) |
38 (31–51) |
42 (33–52) |
49 (37–59) |
<0.001 |
|
| Race | <0.001 | ||||
| White | 1,059 (91.6) | 501 (87.6) | 75 (67.6) | 1,635 (88.9) | |
| Black | 83 (7.2) | 56 (9.8) | 29 (26.1) | 168 (9.1) | |
| Other | 6 (0.5) | 7 (1.2) | 2 (1.8) | 15 (0.8) | |
| Unknown |
8 (0.7) |
8 (1.4) |
5 (4.5) |
|
21 (1.1) |
| Insurance | 0.001 | ||||
| Commercial | 69 (6.0) | 32 (5.6) | 8 (7.2) | 109 (5.9) | |
| Medicaid | 347 (30.0) | 192 (33.6) | 31 (27.9) | 570 (31.0) | |
| Medicare | 256 (22.1) | 154 (26.9) | 42 (37.8) | 452 (24.6) | |
| Self-pay/uninsured | 422 (36.5) | 164 (28.7) | 26 (23.4) | 612 (33.3) | |
| Other/unknown | 62 (5.4) | 30 (5.2) | 4 (3.6) | 96 (5.2) | |
*Values are no. (%) except as indicated. CO, community onset; ED, emergency department; HO, hospital onset; IP, inpatient.