Table 1 Descriptive summary of studies included in the systematic review
| Author, year | Study area | Region | Study subjects | |||||
|---|---|---|---|---|---|---|---|---|
| Sample size | Include age groups | Mean age, SDb | Urban residence, n (%) |
No formal education, n (%) | Marital status, married, n (%) | |||
| Tesfaye, 2017 | Gondar | Amhara | 267 | 18–24 | 20.6 ± 1.2 | 223 (83.5) | nr | nr |
| Ruddies, 2020 | Butajjira | Oromia | 342 | 30–49 | 35.5 ± 5.6) | 34 (9.4) | 217 (63.6) | 325 (95.3) |
| Getachew,2020 | Addis Ababa | AA | 520 | anr | 27.7 ± 5.5 | nr | 77 (14.8) | 369 (71) |
| Bayu, 2016 | Mekelle | Tigri | 1186 | nr | 31.3 ± 9.3 | nr | 145 (12.2) | 768 (64.8) |
| Nigussie, 2019 | Jimma | Oromia | 737 | 30–49 | 36.6 ± 5.3 | nr | 166 (22.5) | 610 (82.8) |
| Kasim, 2020 | Sidama zone | Sidama | 506 | 37 ± 5.3 | nr | 185 (36.6) | 468 (92.5) | |
| Getahun, 2013 | Gondar | Amhara | 633 | > 15 | 31 ± 11.3 | nr | 118 (18.8) | 281 (44.6) |
| Erku, 2017 | Gondar | Amhara | 302 | > 17 | 33.72 ± 9.7 | 211 (69.9) | 33 (10.9%) | 179 (59.3) |
| Geremew, 2018 | Finote Selam | Amhara | 1137 | 30–49 | 37.4 + 5.7 | nr | 513 (45.1) | 755 (66.6) |
| Gebregziabher, 2019 | Aksum | Tigri | 344 | 19–30 | 23.7 ± 2.8 | 261 (75.9) | 0 | 28 (8.1) |
| Mitiku, 2016 | Dessie | Amhara | 620 | 15–49 | nr | 262 (42.3) | 382 (61.6) | |
| Bulto, 2019 | West Shoa | Oromia | 423 | > = 18 | 34.7 ± 7.2 | 346 (81.8) | 109 (25.8) | 199 (47) |
| Mengesha, 2019 | Gondar | Amhara | 770 | 24–32 | 579 (75.2) | 82 (10.6) | 420 (54.5) | |
| Tsegaye, 2018 | Hawassa | SNNP | 380 | 18–26 | 21.5 | Nr | 12 (3.2) | |
| Shiferaw,2016 | Multicenter | 432 | 21–49 | 31.4 ± 4.8 | 367 (85) | 143 (33.1) | 171 (39.6) | |
| Saleem, 2019 | Jimma | Oromia | 154 | nr | 45.2 ± 11.2 | 59 (38) | 133 (86.4) | 107 (72.29) |
| Mruts, 2018 | Debre Berhan | Amhara | 584 | 17–38 | 20.5 ± 1.8 | 214 (37.5) | nr | 23 (4) |
| Tefera, 2016 | Bale Zone | Oromia | 363 | 18–49 | 28 ± 7.5 | nr | 44 (12.2) | 268 (73.8) |
| Aweke, 2017 | Hossana | SNNP | 583 | 18–48 | 28 ± 6.83 | nr | 74 (12.7) | 366 (62.8) |
| Tilahun, 2019 | Nekemte | Oromia | 805 | 17–26 | 22.8 | nr | nr | 36 (4.5) |
| Kasa, 2018 | Finote Selam | Amhara | 735 | 17–88 | 30.8 ± 9.8 | nr | 111 (15.1) | 290 (39.5) |
| Tekle, 2020 | Wolaita Zone | SNNP | 516 | 30–49 | 36.8 ± 5 | 345 (66.9) | 110 (21.3) | 309 (59.9) |
| Segni, 2017 | Addis Ababa | AA | 508 | 21–64 | nr | 211 (46.5) | 454 (89.4) | |
| Indracanti, 2018 | Gondar | Amhara | 283 | 17–30 | 20.86 ± 1.9 | 144 (50.9) | nr | 21 (7.4) |
| Chaka, 2018 | Gamo Gofa | SNNP | 799 | 18–69 | 30 | nr | 347 (43.4) | 596 (74.6 |
| Tefera, 2017 | Dessie | Amhara | 620 | 15–49 | Nr | nr | 262 (42.3) | 382 (61.6) |