Laboratory Outcomes
The pooled weighted mean of percentage of time in
the therapeutic range for patients in the PST or PSM
group was 66.1% (range of means, 56% to 76.5%), only
slightly higher than the value of 61.9% (range of means,
32% to 77%) for the patients in the usual care group (11
studies). The weighted mean difference of 1.50% was not
statistically significant (CI, 0.63% to 3.63%; I2 45%;
P 0.168).
We found no difference in the percentage of INRs in
the therapeutic range between PST or PSM and usual care.