TABLE 3.
Association between demographic characteristics and proportion of warfarin prescriptions* appearing in the individuals§ in the cohort per year (2003-2009)
| Characteristics | 2003 OR (95% CI) | 2004 OR (95% CI) | 2005 OR (95% CI) | 2006 OR (95% CI) | 2007 OR (95% CI) | 2008 OR (95% CI) | 2009 OR (95% CI) |
|---|---|---|---|---|---|---|---|
| Age (ref=<60 years) | |||||||
| ≥60 years | 1.06 (0.91-1.24) | 1.14 (1.00-1.29) | 1.17 (1.04-1.31) | 1.06 (0.95-1.19) | 1.08 (0.98-1.19) | 1.02 (0.94-1.10) | 1.01 (0.94-1.09) |
| Gender (ref=male) | |||||||
| Female | 1.11 (0.95-1.31) | 0.93 (0.81-1.07) | 1.05 (0.93-1.18) | 1.07 (0.95-1.21) | 1.12 (1.01-1.25) | 1.08 (1.00-1.17) | 0.98 (0.90-1.06) |
| Region (ref=Northeast) | |||||||
| North Central | 1.00 (0.77-1.31) | 1.73 (1.38-2.16) | 1.38 (1.14-1.68) | 1.36 (1.13-1.63) | 1.09 (0.91-1.32) | 1.93 (1.74-2.14) | 1.05 (0.94-1.18) |
| South | 0.63 (0.50-0.80) | 1.30 (1.07-1.58) | 1.15 (0.97-1.37) | 1.14 (0.96-1.35) | 0.66 (0.56-0.78) | 1.82 (1.64-2.01) | 1.05 (0.94-1.17) |
| West | 0.95 (0.73-1.24) | 1.53 (1.23-1.89) | 1.19 (0.98-1.45) | 1.15 (0.94-1.40) | 0.93 (0.76-1.13) | 1.85 (1.62-2.10) | 1.13 (0.99-1.29) |
| Plan (ref=Comprehensive) | |||||||
| HMO | 1.21 (0.92-1.60) | 0.75 (0.58-0.97) | 0.71 (0.56-0.89) | 0.97 (0.74-1.26) | 1.17 (0.87-1.58) | 0.62 (0.51-0.75) | 1.00 (0.80-1.25) |
| POS | 0.96 (0.68-1.35) | 0.71 (0.84-0.95) | 0.73 (0.56-0.84) | 0.83 (0.63-1.08) | 1.05 (0.78-1.43) | 1.01 (0.80-1.27) | 0.88 (0.96-1.12) |
| PPO | 0.60 (0.48-0.75) | 0.58 (0.47-0.73) | 0.66 (0.53-0.81) | 0.67 (0.54-0.84) | 0.73 (0.56-0.95) | 0.79 (0.65-0.95) | 0.81 (0.66-0.99) |
*
Any warfarin prescription (generic or brand)
§
Characteristics are provided at the individual level per year, so column totals add to less than 183,308
Abbreviations: OR, Odds Ratio; CI, Confidence Interval; HMO, Health Maintenance Organization; POS, Point of Service; PPO, Preferred Provider Organization