Table 1.
Baseline characteristics for Scotland’s 36,606 CHI-indexed methadone-prescription clients, 2009–2015.
|
Covariates defined by 1st CHI-identified methadone prescription during 1 July 2009 to 30 June 2015 |
Clients N = 36,606 |
Non-DRDs N = 1,939 |
DRDs N = 1,323 |
PERSON-YEARS (%): mean person-years (pys) per client PYS = 193,813: 5.3 pys |
|
|---|---|---|---|---|---|
| Cohort-entry period | July – Dec 2009 | 20,757 (57) | 1,220 (63) | 857 (65) | 129,896 (67): 6.3 pys |
| 2010 | 6,534 (18) | 348 (18) | 256 (19) | 35,409 (18): 5.4 pys | |
| 2011 | 3,034 (8) | 153 (8) | 111 (8) | 13,469 (7): 4.4 pys | |
| 2012 | 1,965 (5) | 74 (4) | 45 (3) | 6,952 (4): 3.5 pys | |
| 2013 | 1,857 (5) | 72 (4) | 29 (2) | 4,694 (2): 2.5 pys | |
| 2014 | 1,704 (5) | 56 (3) | 23 (2) | 2,731 (1): 1.6 pys | |
| January – June 2015 | 755 (2) | 16 (1) | 2 (nil) | 663 (< 1): 0.9 pys | |
| Prescription source | GP-prescription | 23,760 (65) | 1,426 (74) | 847 (64) | 131,379 (68): 5.5 pys |
| Other-source | 12,846 (35) | 513 (26) | 476 (36) | 62,434 (32): 4.9 pys | |
| Gender | Males | 24,369 (67) | 1350 (70) | 908 (69) | 128,492 (66): 5.3 pys |
| Females | 12,237 (33) | 589 (30) | 415 (31) | 65,322 (34): 5.3 pys | |
| Age-group at cohort-entry | Under 25 years | 2,899 (8) | 49 (3) | 61 (5) | 14,366 (7): 5.0 pys |
| 25 – 34 | 15,953 (44) | 404 (21) | 503 (38) | 86,812 (45): 5.4 pys | |
| 35 – 44 | 13,498 (37) | 804 (41) | 565 (43) | 72,768 (38): 5.4 pys | |
| 45 + years | 4,256 (12) | 682 (35) | 194 (15) | 19,868 (10): 4.7 pys | |
| QUINTILE for baseline quantity of prescribed methadone | Q1: 1–240 mg | 7,462 | 412 | 223 | 33,355 (17): 4.5 pys |
| Q2: 241–616 mg | 7,187 | 406 | 273 | 36,654 (19): 4.6 pys | |
| Q3: 617–1120 mg | 7,674 | 373 | 265 | 42,553 (22):5.6 pys | |
| Q4: 1121–1960 mg | 7,804 | 413 | 280 | 43,656 (23): 5.6 pys | |
| Q5: > = 1961 mg | 7,479 | 335 | 282 | 37,595 (19): 5.0 pys | |
| QUINTILE for available baseline daily-dose of prescribed methadone | Baseline daily-dose not available | 26,226 (72%) | 1,392 (72%) | 979 (74%) | 132,966 pys (69%): 5.1 pys |
| Q1: 1 - 30 mg | 2,350 | 173 | 72 | 13,008 (7): 5.5 pys | |
| Q2: 31 - 50 mg | 2,206 | 104 | 67 | 12,965 (7): 5.9 pys | |
| Q3: 51 - 70 mg | 2,182 | 113 | 71 | 13,006 (7): 6.0 pys | |
| Q4: 71 - 90 mg | 1,844 | 76 | 66 | 11,066 (6): 6.0 pys | |
| Q5: 91 – 280 mg | 1,798 | 81 | 68 | 10,802 (6): 6.0 pys | |
Boldface: for headings.