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Table 8 Sensitivity analysis for odds ratios modeling death, for patients who are adherent versus non-adherent to anti-hypertensive medication, using different thresholds to define adherence

From: Measuring medication adherence in patients with incident hypertension: a retrospective cohort study

 

Adjusted ORa

95% CI

P value

Adherence >0.65

MPRi

Low

0.96

(0.74, 1.26)

0.787

High

0.91

(0.65, 1.26)

0.560

Sum

0.89

(0.62, 1.27)

0.509

Mean

0.99

(0.75, 1.31)

0.940

MPRp

Low

0.74

(0.52, 1.06)

0.101

High

0.81

(0.53, 1.23)

0.317

Sum

0.80

(0.52, 1.22)

0.294

Mean

0.78

(0.53, 1.16)

0.222

PDC

0.84

(0.60, 1.14)

0.323

Adherence >0.70

MPRi

Low

0.92

(0.71, 1.19)

0.514

High

0.87

(0.64, 1.19)

0.385

Sum

0.78

(0.56, 1.09)

0.151

Mean

0.88

(0.67, 1.14)

0.324

MPRp

Low

0.71

(0.51, 0.98)

0.036

High

0.71

(0.49, 1.02)

0.063

Sum

0.69

(0.48, 1.00)

0.052

Mean

0.64

(0.45, 0.90)

0.011

PDC

0.77

(0.56, 1.07)

0.117

Adherence >0.75

MPRi

Low

0.96

(0.75, 1.24)

0.767

High

0.91

(0.68, 1.21)

0.515

Sum

0.81

(0.59, 1.11)

0.186

Mean

0.88

(0.68, 1.14)

0.322

MPRp

Low

0.74

(0.55, 1.00)

0.053

High

0.77

(0.54, 1.08)

0.132

Sum

0.71

(0.50, 1.00)

0.052

Mean

0.70

(0.51, 0.97)

0.030

PDC

 

0.82

(0.61, 1.11)

0.203

Adherence >0.80

MPRi

Low

0.96

(0.74, 1.23)

0.743

High

0.90

(0.68, 1.19)

0.475

Sum

0.78

(0.58, 1.05)

0.104

Mean

0.88

(0.68, 1.13)

0.321

MPRp

Low

0.79

(0.59, 1.05)

0.098

High

0.76

(0.56, 1.05)

0.094

Sum

0.70

(0.51, 0.97)

0.029

Mean

0.71

(0.53, 0.95)

0.021

PDC

0.80

(0.60, 1.07)

0.130

Adherence >0.85

MPRi

Low

0.89

(0.69, 1.15)

0.367

High

0.83

(0.64, 1.08)

0.175

Sum

0.75

(0.57, 0.99)

0.044

Mean

0.88

(0.69, 1.13)

0.329

MPRp

Low

0.80

(0.61, 1.05)

0.103

High

0.80

(0.59, 1.07)

0.136

Sum

0.70

(0.52, 0.94)

0.018

Mean

0.80

(0.61, 1.06)

0.120

PDC

0.79

(0.60, 1.04)

0.095

Adherence >0.90

MPRi

Low

0.95

(0.74, 1.23)

0.713

High

0.92

(0.71, 1.18)

0.500

Sum

0.85

(0.65, 1.12)

0.244

Mean

0.93

(0.72, 1.20)

0.589

MPRp

Low

0.83

(0.64, 1.07)

0.156

High

0.89

(0.68, 1.18)

0.427

Sum

0.79

(0.59, 1.04)

0.094

Mean

0.86

(0.66, 1.11)

0.250

PDC

0.88

(0.67, 1.14)

0.332

  1. a Adjusted for age, sex, Charlson comorbidity index, income quintile, and previous hospitalization for cardiovascular disease
  2. Where “Low” = adherence estimate for the single medication class with the lowest adherence; “High” = adherence estimate for the single medication class with the highest adherence; “Sum” = adherence to any medication class (where days supply for each medication class summed as the numerator); “Mean” = mean adherence to each medication class
  3. Abbreviations: OR odds ratio, CI confidence interval, MPRi interval based medication possession ratio, MPRp prescription based medication possession ratio, PDC proportion of days covered