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Table 1 MTX dose and corresponding MTX adherence limits (nM)11

From: Adherence to low-dose methotrexate in children with juvenile idiopathic arthritis using a sensitive methotrexate assay

 

Adherence limits MTX concentration (nM)

MTX dose (mg/week)

T = 168 h

T < 168 h

5

0.1

< 48 h:

≥ 48 h - ≤96 h:

> 96 h:

0.2

0.15

0.1

7.5

0.15

≤ 36 h:

> 36 h - <96 h:

≥ 96 h - <144 h:

≥ 144 h:

0.5

0.25

0.2

0.15

10

0.2

≤ 36 h:

> 36 h - ≤144 h:

> 144 h:

0.5

0.25

0.2

12.5

0.25

< 48 h:

≥ 48 h:

0.5

0.25

15

0.25

≤ 96 h:

> 96 h:

0.5

0.25

17.5

0.25

≤ 144 h:

> 144 h:

0.5

0.25

20

0.25

≤ 48 h:

> 48 h - ≤144 h:

> 144 h:

0.75

0.5

0.25

22.5–25

0.5

< 72 h:

≥ 72 h:

0.75

0.5

  1. MTX, methotrexate