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Table 1 Number of participants approached and randomised by each GP practice

From: Study of Optimal Replacement of Thyroxine in the Elderly (SORTED) – results from the feasibility randomised controlled trial

Practices a

Total registered patients (n) (A)

Potentially eligible hypothyroid patients aged ≥ 80 year (% of A)

Invites sent c (n) (B)

Replies received (% of B)

Consented to be screened (n) (% of B)

Randomised (n) (% of B)

A

16,340

112 (0.7 %)

112

63 (56 %)

20 (18 %)

13 (12 %)

B

5475

42 (0.8 %)

42

25 (60 %)

6 (14 %)

6 (14 %)

C

8830

75 (0.9 %)

14

14 (100 %)

7 (50 %)

5 (36 %)

D

9230

58 (0.6 %)

39

23 (59 %)

5 (13 %)

3 (8 %)

E

11,019

63 (0.6 %)

20

15 (75 %)

3 (15 %)

3 (15 %)

F

10,141

28 b

11

10 (91 %)

4 (36 %)

3 (30 %)

G

5960

82 (1.4 %)

20

14 (70 %)

4 (20 %)

3 (15 %)

H

6875

52 (0.8 %)

10

6 (50 %)

3 (30 %)

3 (30 %)

I

4478

57 (1.3 %)

4

4 (100 %)

2 (50 %)

2 (50 %)

J

7460

36 (0.5 %)

36

20 (50 %)

6 (17 %)

1 (3 %)

K

3728

7 b

7

4 (57 %)

1 (14 %)

1 (14 %)

L

11,788

31 b

20

14 (70 %)

1 (5 %)

1 (5 %)

M

6893

9 b

9

3 (33 %)

1 (11 %)

1 (11 %)

N

19,223

20 b

10

7 (70 %)

1 (10 %)

1 (10 %)

O

3274

3 b

3

1 (33 %)

1 (33 %)

0 (0 %)

P

3296

12 b

5

2 (40 %)

1 (20 %)

0 (0 %)

Q

5565

15 b

15

8 (53 %)

0 (0 %)

0 (0 %)

Total

139,575

703

377

233 (62 %)

66 (18 %)

46 (12 %)

  1. aThe names of the GP practices are not shown to protect identity
  2. bFor these practices the total number of potentially eligible patients was not provided
  3. cSome practices were asked to only send invites to a random selection of patients to be able to obtain a wide spread of responses from GP practices as possible