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. 2021 Mar 23;13(3):1036. doi: 10.3390/nu13031036

Table 1.

Summary data for included systematic reviews.

Systematic Reviews Reporting Smoking Interventions (n = 2) Systematic Reviews Reporting Diet and/or Physical Activity Interventions (n = 37) Systematic Reviews Reporting Diet-only Interventions (n = 19) Systematic Reviews Reporting Physical-Activity-only Interventions (n = 37)
Time period of included intervention studies in the reviews
Range in years: 1976 to 2016 1974 to 2018 1975 to 2018 1974 to 2019
Search strategies:
Databases only (n) 0 3 1 2
Supplementary searches (n) 2 34 18 35
Included study designs:
RCT only (n) 2 24 18 27
RCT + other design (n) 0 13 1 10
Number included studies in the systematic reviews
Range (n) 16 to 88 5 to 113 4 to 89 3 to 113
Median (n) N/A 21 (IQR 14 to 46) 23 (IQR 14 to 44) 23 (IQR 10 to 49)
Pooled sample sizes included in the systematic reviews
Range (n women) 6192 to >26,000 363 to 273,182 537 to 182,139 214 to 598,185
Median (n women) N/A 6920 (IQR 2748 to 12,007) 8558 (IQR 2786 to 11,487) 4350 (IQR 1768 to 14,601)
Not reported (n) 1 * 0 0 1 *
Countries of intervention studies included in the systematic reviews (reported for n systematic reviews) Not reported for 6 systematic reviews Not reported for 6 systematic reviews Not reported for 7 systematic reviews
HICs represented in the included interventions 1. Australia
2. Canada
3. Denmark
4. France
5. Greece
6. Ireland
7. Netherlands
8. New Zealand
9. Norway
10. Poland
11. Spain
12. Sweden
13. UK
14. USA
1. Australia
2. Belgium
3. Canada
4. Croatia
5. Denmark
6. Finland
7. France
8. Germany
9. Greece
10. Ireland
11. Italy
12. Japan
13. Netherlands
14. New Zealand
15. Norway
16. Poland
17. Portugal
18. South Korea
19. Spain
20. Sweden
21. Switzerland
22. Taiwan
23. UK
24. USA
1. Australia
2. Belgium
3. Canada
4. Chile
5. Denmark
6. Finland
7. Germany
8. Greece
9. Ireland
10. Italy
11. Netherlands
12. New Zealand
13. Norway
14. Spain
15. Sweden
16. Taiwan
17. UK
18. USA
1. Australia
2. Belgium
3. Canada
4. Croatia
5. Denmark
6. Finland
7. France
8. Germany
9. Greece
10. Ireland
11. Italy
12. Japan
13. Netherlands
14. New Zealand
15. Norway
16. Poland
17. Portugal
18. South Korea
19. Spain
20. Sweden
21. Switzerland
22. Taiwan
23. UK
24. USA
UMICs represented in the included interventions 1. Argentina
2. Brazil
3. Columbia
4. Cuba
5. Mexico
1. Argentina
2. Brazil
3. China
4. Colombia
5. Iran
6. Kosovo
7. Mexico
8. Serbia
9. South Africa
10. Thailand
11. Turkey
1. Argentina
2. Brazil
3. China
4. Columbia
5. Indonesia (East Java)
6. Iran
7. Kosovo
8. Mexico
9. South Africa
10. Turkey
1. Argentina
2. Brazil
3. China
4. Colombia
5. Iran
6. Kosovo
7. Mexico
8. Serbia
9. South Africa
10. Thailand
11. Turkey
LMICs represented in the included interventions None 1. Benin
2. Egypt
3. India
4. Pakistan
1. Egypt
2. India
1. Benin
2. Egypt
3. India
4. Pakistan
LICs represented in the included interventions None None 1. Gambia None

Footnote: Income status of the countries defined according to the World Bank data for the current 2020 fiscal year “low-income economies are defined as those with a GNI per capita, calculated using the World Bank Atlas method, of $1025 or less in 2018; lower middle-income economies are those with a GNI per capita between $1026 and $3995; upper middle-income economies are those with a GNI per capita between $3996 and $12,375; high-income economies are those with a GNI per capita of $12,376 or more” [93]. Abbreviations: HICs = High Income Countries; UMICs = Upper Middle-Income Countries; LMICs -= Lower Middle-Income Countries; LICs = Lower Income Countries; IQR = Interquartile Range; N/A = not applicable to calculate median with only two systematic reviews.* One smoking systematic review reported >26,000 women but not the exact number; one physical activity only systematic review reported the number of neonates rather than the number of women.