Table 1 Characteristics of the included studies in this meta-analysis.

From: Preoperative Somatostatin Analogues in Patients with Newly-diagnosed Acromegaly: A Systematic Review and Meta-analysis of Comparative Studies

Author

Year

Study design

Patients No. SSA/Non-SSA

Matching factor

Approach

Tumor size SSA/Non-SSA

Remission criteria

SSA regimen

Follow-up

Dosage

Frequency

Duration

Stevenaert

1996

R

SSA: 64

Non-SSA: 108

NA

TS

Micro: 33/31 (*)

Macro: 31/77 (*)

1

Octreotide 100–500 ug

Tid

Range: 3 w-39 mo

Mean, 6.4 yr

Range, 0.5–24 yr

Biermasz

1999

P

SSA: 19

Non-SSA: 19

1, 2

TS

Micro:5/5

Macro:14/14

1

Octreotide

150–1500 ug

Qd

Mean: 5 mo

Range: 1–17 mo

SSA: 5.7 ± 0.5 yr

Non-SSA: 4 ± 0.6 yr

Kristof

1999

P

SSA: 11

Non-SSA: 13

Ra

TS

Macro: 11/13

1

Octreotide

50–300 ug

Tid

Mean: 16.5 w

NA

Abe

2001

R

SSA: 71

Non-SSA: 53

1

TS

Micro: 7/14

Macro: 64/39

1

Octreotide

100–1500 ug

Qd

Mean: NA

Range: 3–21 mo

SSA: 51.7 ± 1.4 mo

Non-SSA: 49.3 ± 2.9 mo

Plöckinger

2005

R

SSA: 24

Non-SSA: 24

1, 2

TS

Macro: 24/24

1

Octreotide

100–500 ug

Tid

Range: 3–6 mo

SSA: > 4 yr

Non-SSA: > 10 yr

Carlsen

2008

RCT

SSA: 31

Non-SSA: 30

Ra

TS

Micro: 5/5

Macro: 26/25

1

Octreotide

20 mg

Every 28 d

6 mo

SSA: > 3 mo

Non-SSA: > 3 mo

Mao

2010

RCT

SSA: 49

Non-SSA: 49

Ra

TS

Macro: 49/49

1

Lanreotide

30 mg

Every 1–2 w

4 mo

SSA: > 4 mo

Non-SSA: > 4 mo

Shen

2010

RCT

SSA: 19

Non-SSA: 20

Ra

TS

Macro: 19/20

1

Octreotide

20 mg

Every 28 d

3 mo

SSA: > 6 mo

Non-SSA: > 6 mo

Li

2012

RCT

SSA: 24

Non-SSA: 25

Ra

TS

Macro: 24/25

1

Lanreotide

30 mg

Every 1–2 w

3 mo

SSA: > 3 mo

Non-SSA: > 3 mo

Fougner

2014

RCT

SSA: 31

Non-SSA: 30

Ra

TS

Micro: 5/5

Macro: 26/25

1

Octreotide 20 mg

Every 28 d

6 mo

SSA: > 5 yr

Non-SSA: > 5 yr

Abarel

2018

R

SSA: 64

Non-SSA: 46

NA

TS

Micro: 12/8

Macro: 42/33

(reported in 95 patients)

2

Octreotide 10–30 mg/Lanreotide 60–90 mg

Every month

Mean: 6.4 mo

Range: 3–18 mo

SSA: 46.5 ± 35.2 mo

Non-SSA: 57.8 ± 39.9 mo

Lv

2018

R

SSA: 38

Non-SSA: 62

NA

TS, TC

Macro: 38/62

1

Octreotide

20 mg/Lanreotide 30 mg

Every 4/2 w

Median 3 m

range:1–13 m

SSA: > 6 mo

Non-SSA: > 6 mo

  1. Study design: R = retrospective study; P = prospective study; RCT = randomized controlled trial.
  2. Approach: TS = transsphenoidal; TC = transcranial.
  3. Matching factor: NA = not available; 1 = tumor classification; 2 = preoperative GH; Ra = randomized.
  4. Tumor size: Macro = macroadenoma (>1 cm); Micro = microadenoma (<1 cm).
  5. Tumor size (*): Macro = macroadenoma (>1.5 cm); Micro = microadenoma (<1.5 cm).
  6. Remission criteria: 1 = nadir GH <1 ug/L during OGTT and normal levels of IGF-1; 2 = nadir GH <0.4 ug/L during OGTT and normal levels of IGF-1.