Table 1. Baseline Characteristics.
Characteristic | ECG on Methadone (n=134) | ECG off Methadone (n=404) | P |
---|---|---|---|
Age at time of ECG, years (SD) | 45.2 (12.2) | 41.5 (10.8) | <0.001 |
Male (%) | 69 (51.5) | 212 (52.5) | NS |
Race (%) | <0.0001 | ||
Caucasian | 67 (50.0) | 205 (50.7) | |
African American | 33 (24.6) | 145 (35.9) | |
Asian | 23 (17.1) | 13 (3.2) | |
Other | 11 (8.2) | 41 (10.2) | |
ECG Setting (%) | NS | ||
Emergency department | 97 (72.4) | 278 (69.0) | |
Inpatient | 16 (11.9) | 31 (7.7) | |
Outpatient | 21 (15.7) | 95 (23.3) | |
QTc, msec (SD) | 436 (36) | 423 (33) | <0.001 |
QTc ≥ 500 msec (%) | 4 (3.0) | 6 (1.5) | NS |
Dose, mg (range) (SD)* | 77 (1-285) (41) | -- |
Dose data missing in 12 patients