Table 2 Summary of the associated factors from studies included in this systematic review and meta-analysis for magnitude and associated factors of anemia among adolescent girls in Ethiopia, 2021

1

Regasa T et al. 2019 [31]

Late adolescent age (15–19)

3.8 (2.3, 8.5)

Rural residence

3.4 (1.9,7)

Attained menarche

2.3 (1.34,4.2)

2

Gebreyesus S et al. 2019 [33]

Early adolescent age (10–14)

1.98 (1.03, 3.82)

Food insecure households

1.98 (1.03, 3.82)

Poor/no knowledge about anemia

1.58[1.09,2.29]

3

Teji K et al. 2016 [34]

Late adolescent (15–19)

P-value = 0.001 (from chi-square test)

Rural residence

P-value = 0.007(from chi-square test)

Food insecure households

P-value = 0.02 (from chi-square test)

Farmer occupation of the mother

P-value = 0.02 (from chi-square test)

4

Engidaw M et al. 2018 [21]

Late adolescent (15–19)

1.95 (1.09, 3.47)

 ≤ once per week consumption of hem iron source foods

11.42 (3.42, 38.18)

5

Tesfaye M et al. 2015 [28]

Attained menarche

2.34 (1.20, 4.54)

Daily worker father

2.86 (1.15, 7.09)

 ≥ 5 family size

2.58 (1.11,5.96)

Father illiteracy

9.03 (4.29,18.87)

Presence of intestinal parasite

5.37(2.65,10.87)

Low body mass index (BMI)

2.54 (1.17,5.51)

6

Shaka M et al. 2018 [30]

Early adolescent (10–14)

4.75 (1.69,13.35)

Rural residence

4.37 (1.54,12.46)

 ≥ 5 family size

9.82 (2.42,39.88)

7

Teni M et al. 2017 [29]

Early adolescent (10–14)

3.4 (1.4—8.2)

Walking barefoot

2.7 (1.1, 6.6)

8

Seid O et al. 2015 [25]

 ≤ once per week consumption of hem iron source foods

2.03(1.13,3.01)

 ≤ once per week milk consumption

2.2(1.2,4.3)

 ≤ once per week vegetable consumption

2.4(1.24,4.67)

9

Mengistu G et al. 2019 [22]

 ≥ 5 days of blood flow during menses

2.4 (1.08,5.44)

 ≥ 5 family size

3.2 (1.29, 7.89)

Presence of intestinal parasite

2.7(1.19,6.21)

Low body mass index (BMI)

3.2(1.43,7.05)

Low income (≤ 500 Ethiopian Birr)

10 (2.49,41.26)

10

Gonete K et al. 2018 [23]

Food insecure households

1.9(1.1, 3.5)

Living with either parents or guardians

2.2(1.08,4.6)

Inadequate diet diversity

2.1(1.3,3.5)

11

Alemu T et al. 2020 [26]

 ≥ 5 days of blood flow during menses

6.4 (1.55, 27.0)

 ≥ 5family size

0.37(0.16, 0.92)

Inadequate diet diversity

3.6(1.7, 7.7)

History of malaria infection

3.2(1.4, 7.2)

Physical workload

4 (1.7, 9.5)

Low altitude

3.2(1.23, 8.31)

12

Demelash S et al. 2019 [35]

 ≤ once per week consumption of hem iron source foods

2.54 (1.53, 6.24)

 ≤ once per week vegetable consumption

2.15 (1.48, 4.78)

Maternal illiteracy

1.7 (1.01, 5.1)

Low body mass index (BMI)

2.72 (1.92, 5.43)

Drinking of tea

4.2 (2.37, 10.24)