Table 1 Basic characteristics of research and the evaluation of research quality
Author, year | Study area | Study time | Study type | Study population | NEC diagnostic criteria | Case group/ control group | Influencing factors | NOS score |
|---|---|---|---|---|---|---|---|---|
Zeng, 2021 [24] | Sichuan | 2011.1-2019.10 | Case control | BW < 1500 g, Bell staging ≥ II | Adoption of modified BELL-NEC grading standards (1978) | 30/467 | ①⑮ | 7 |
Cheng, 2016 [23] | Sichuan | 2010.3-2015.3 | Case control | GA < 34 weeks, Bell staging ≥ II | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 66/132 | ①②③⑨⑫ | 8 |
Liu, 2019 [25] | Fujian | 2012.1-2018.12 | Case control | BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 95/95 | ④⑦⑯ | 7 |
Shang, 2014 [26] | Sichuan | 2011.8-2013.9 | Case control | GA < 37 weeks, BW < 2500 g | Adoption of modified BELL-NEC grading standards (1978) | 37/62 | ④⑨⑩ | 7 |
Sun, 2017 [27] | Shandong | 2013.12-2016.9 | Case control | GA < 37 weeks, BW < 2000 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 37/60 | ②③⑤⑨⑩ | 8 |
Dong, 2021 [10] | Henan | 2012.1-2019.11 | Case control | GA < 32 weeks, Bell Staging II-III | Revised Bell Subdivision periodical standard (1986) | 113/113 | ①⑩ | 7 |
Lu, 2022 [28] | Zhejiang | 2018.1-2019.12 | Case control | GA < 34weeks, BW < 1500 g, Bell staging ≥ II | Practical Neonatology, 5th Edition | 52/52 | ②⑨⑬ | 6 |
Wang, 2022 [29] | Jilin | 2011.1-2020.12 | Case control | GA < 37weeks, Bell Staging II-III | Practical Neonatology, 5th Edition | 298/300 | ②⑨ | 7 |
Li, 2019 [30] | Shanxi | 2012.2-2018.11 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 25/175 | ③⑤⑥⑨⑩⑰ | 6 |
Lu, 2018 [31] | Guangxi | 2013.1-2015.5 | Case control | GA < 33weeks, Bell staging ≥ II | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 50/50 | ①③⑨⑩⑪⑱ | 7 |
Lu, 2013 [32] | Jiangxi | 2011.7-2013.4 | Case control | GA < 37 weeks, BW < 2500 g | Refer to Avery’s diseases of the newborn the revised Bell marking criteria | 54/57 | ①④⑰ | 6 |
Lu, 2015 [33] | Xamen | 2008.1-2011.12 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 59/95 | ④⑨⑩ | 6 |
Qu, 2019 [34] | Guangdong | 2013.6-2015.12 | Case control | GA ≤ 32weeks | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 65/130 | ①②③⑦⑧⑫ | 8 |
Shi, 2019 [35] | Shanxi | 2015.1-2018.6 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 32/150 | ①②③⑦⑧⑩ | 7 |
Wang, 2014 [36] | Beijing | 2010.10-2012.12 | Case control | GA < 33weeks, Bell staging ≥ II | Adoption of modified BELL-NEC grading standards (1978) | 49/121 | ③ | 7 |
Yu, 2018 [37] | Guizhou | 2006.1-2015.12 | Case control | BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 146/146 | ①②⑨⑩⑪ | 7 |
Zhu, 2012 [38] | Jiangsu | 2006.8-2011.4 | Case control | BW < 1500 g, Bell staging ≥ II | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 20/303 | ①⑪ | 8 |
Hou, 2017 [39] | Liaoning | 2011.1-2016.1 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 76/80 | ①⑧⑨ | 7 |
Song, 2021 [40] | Henan | 2012.1-2020.7 | Case control | BW < 2500 g, Bell Staging II-III | Revised Bell Subdivision periodical standard (1986) | 166/166 | ②⑱ | 9 |
Zhang, 2019 [41] | Sichuan | 2013.1-2016.12 | Case control | GA< 37weeks, BW 1 000 ~ 1 499 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 33/33 | ①③⑩ | 8 |
Lu, 2017 [42] | Chongqing | 2010.3-2015.3 | Case control | GA < 37 weeks, BW < 2500 g, Bell staging ≥ II | Practical Neonatology, 4th Revised Bell staging /diagnostic criteria | 66/132 | ①②③⑨⑫ | 9 |
Zhu, 2021 [43] | Anhui | 2015.5-2020.1 | Case control | BW ≥ 1000 g, < 1500 g, Bell staging ≥ II | Refer to Avery’s diseases of the newborn the revised Bell marking criteria | 19/218 | ①⑨⑳ | 9 |
Huang, 2022 [44] | Chongqing | 2008.1-2021.12 | Case control | small for GA infant, prematurity, Bell staging ≥ II | Reference to the Vermont Oxford Network’s revised diagnostic criteria based on Bell staging | 140/280 | ①⑨⑬⑱ | 7 |
Liu, 2022 [11] | Neimenggu | 2015.1-2021.12 | Case control | GA < 32weeks | Reference Modification Bell Staging (1978) | 77/577 | ①③⑮⑱ | 8 |
Yang, 2022 [45] | Beijing | 2016.3-2020.6 | Case control | GA < 37 weeks, BW < 2500 g, | Reference Modification Bell Staging (1978) | 78/100 | ①⑬ | 8 |
Yang, 2018 [46] | Sichuan | 2016.1-2016.12 | Case control | GA < 37 weeks | Practical Neonatology, 4th, Revised Bell staging diagnostic criteria | 22/407 | ⑧⑩⑬①| 7 |
Zhuang, 2007 [47] | Fujian | 2002.1-2005.5 | Case control | GA < 37 weeks | Refer to Avery’s diseases of the newborn the revised Bell marking criteria | 20/80 | ①⑨①| 6 |
Li ,2020 [48] | Jiangsu | 2014.5-2018.12 | Case control | GA 32–37 weeks, BW < 2500 g | Reference to the U.S. Guidelines for the Management of Necrotizing Small Bowel Colitis in Very Low Birth Mass Children | 57/30 | ②③⑯ | 7 |
Ma, 2021 [49] | Zhejiang | 2017.9-2020.6 | Case control | GA < 34weeks, Bell staging ≥ stage II | Reference Modification Bell Staging (1978) | 54/106 | ⑥⑫ | 6 |
Deng, 2017 [50] | Sichuan | 2014.1-2016.12 | Case control | GA < 34weeks, Bell staging ≥ stage II | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 54/108 | ①②③⑦⑬ | 6 |
Zhu, 2020 [51] | Hebei | 2019.1-2019.9 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 38/462 | ①③④⑨⑩ | 8 |
Wang, 2017 [52] | Henan | 2013.6-2016.6 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 58/36 | ①⑦⑨⑩ | 7 |
Wang, 2020 [53] | Henan | 2010.1-2018.12 | Case control | GA < 37 weeks, BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 30/34 | ①④⑨⑩ | 6 |
Zhang, 2017 [54] | Guangdong | 2013.1-2015.12 | Case control | GA < 32 weeks | Reference Modification Bell Staging (1978) | 61/376 | ①③⑩⑳ | 6 |
Chen, 2020 [55] | Chongqing | 2010.1-2016.10 | Cohort study | GA < 34 weeks, Bell staging ≥ stage II | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 30/150 | ①⑲ | 8 |
Tan, 2022 [56] | Sichuan | 2019.1-2021.6 | Cohort study | 1500 g < BW < 2500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 68/124 | ①②⑩⑪ | 9 |
Yu, 2023 [12] | Hainan | 2014.1-2021.12 | Case control | BW < 1500 g, Bell staging ≥ stage II | Reference Modification Bell Staging (1978) | 62/62 | ①⑯⑱ | 9 |
Tain, 2023 [57] | Shandong | 2017.4-2019.6 | Case control | GA < 37 weeks, BW < 1500 g | Practical Neonatology, 4th Revised Bell staging diagnostic criteria | 19/91 | ①③⑨⑲ | 7 |