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Table 2 Detailed breakdown of serum lithium concentration profile by site and source of requests

From: Serum lithium test requesting across three UK regions: an evaluation of adherence to monitoring guidelines

 

Lithium concentration (mmol/L)

Median (IQR)

lithium concentration

(mmol/L)

< 0.1

0.1–0.39

0.4–0.59

0.6–0.79

0.8–0.99

1.0–1.39

≥1.4

Total

Site

         

PAT

3.5%

16.0%

29.9%

30.2%

14.3%

5.1%

1.1%

100.0%

0.60 (0.44–0.76)

SRFT

3.3%

17.5%

32.6%

29.9%

12.0%

3.9%

0.8%

100.0%

0.58 (0.43–0.73)

UHNM

2.6%

14.0%

27.4%

30.5%

17.9%

6.4%

1.2%

100.0%

0.63 (0.47–0.80)

Total

3.2%

16.0%

30.1%

30.2%

14.4%

5.1%

1.0%

100.0%

0.60 (0.44–0.76)

Source

         

GP

53.7%

47.7%

57.2%

60.0%

60.6%

53.7%

24.4%

56.4%

0.61 (0.46–0.76)

MHU

31.3%

39.1%

35.6%

33.9%

32.4%

28.3%

11.1%

34.4%

0.58 (0.42–0.74)

Acute care

4.5%

3.0%

1.5%

1.1%

1.8%

6.0%

38.0%

2.4%

0.66 (0.38–1.10)

Secondary care

9.3%

9.2%

5.0%

4.3%

4.7%

11.3%

25.9%

6.1%

0.53 (0.34–0.75)

Other

1.3%

1.0%

0.6%

0.7%

0.5%

0.7%

0.6%

0.7%

0.57 (0.38–0.68)

Total

100.0%

100.0%

100.0%

100.0%

100.0%

100.0%

100.0%

100.0%

 
  1. The categories within the NICE- and BNF-recommended therapeutic range are highlighted in bold: 0.4–0.59 mmol/L for BNF extension to the NICE-recommended range, 0.6–0.79 mmol/L for NICE-recommended range for people receiving routine lithium treatment; 0.8–0.99 mmol/L for NICE-recommended range for people who have relapsed whilst taking lithium, or people who have sub-threshold symptoms with functional impairment