Table 4.

Logistic regression predicting those with >80% time in therapeutic range

	Odds ratio	95% CI	P-value
All participants (n = 269)

Age, years^{^a}	1.024	1.000 to 1.048	0.052

Male^{^a}	1.320	0.753 to 2.312	0.332

Condition requiring oral anticoagulation therapy^{^a}
Antiphospholipid syndrome	1.000	–
Atrial fibrillation	5.231	1.249 to 21.904	0.024
Mechanical heart valve	3.685	0.933 to 14.555	0.063
Thrombosis	4.684	1.209 to 18.149	0.025

Duration of self-monitoring, months^{^a}	1.004	0.998 to 1.010	0.225

Procedure during follow-up^{^a}
Major	1.000	–
None	2.181	0.907 to 5.242	0.081
Minor	0.885	0.270 to 2.889	0.840

Previous OAT complication^{^a}	0.630	0.352 to 1.126	0.119

EQ-5D visual scale	1.017	1.001 to 1.034	0.032

Participants with antiphospholipid syndrome excluded (n = 245)

Age, years^{^a}	1.025	1.003 to 1.049	0.027

Male^{^a}	1.303	0.736 to 2.306	0.364

Duration of self-monitoring, months^{^a}	1.003	0.997 to 1.010	0.295

Procedure during follow-up^{^a}
Major	1.000	–
None	2.023	0.836 to 4.893	0.118
Minor	0.734	0.221 to 2.443	0.614

Previous OAT complication^{^a}	0.752	0.412 to 1.374	0.354

EQ-5D visual scale	1.019	1.003 to 1.036	0.020

Target INR	0.480	0.246 to 0.939	0.032

↵a Variables the model was required to include. INR = international normalised ratio. OAT = oral anticoagulation therapy.