Overall incidence of neurodevelopmental impairment (NDI) in patients with necrotising enterocolitis (NEC) from 31 studies included
| Reference | Study period (birth date, in years) | Age at follow-up (months) | Incidence of NDI in patients with NEC (%, n/N) |
| Walsh et al 41 | 1975–1983 | 20 | 33 (12/36) |
| Jackman et al 42 | 1980–1986 | 24–84 | 17 (5/30) |
| Ricketts and Jerles43 | 1980–1988 | 10–102 | 47 (23/49) |
| Kurscheid and Holschneider44 | 1974–1988 | 24 | 28 (9/32) |
| Simon et al 19 | 1986–1988 | 15 | 28 (5/18) |
| Mayr et al 20 | 1978–1991 | 12–156 | 75 (9/12) |
| Tobiansky et al 21 | 1986–1991 | 36–60 | 35 (17/49) |
| Waugh et al 45 | 1977–1990 | 24 | 30 (7/23) |
| Chacko et al 22 | 1990–1993 | 12–59 | 21 (6/28) |
| Hack et al 38 | 1992–1995 | 20 | 64 (7/11) |
| Sonntag et al 23 | 1992–1996 | 20 | 85 (17/20) |
| Yeh et al 24 | 1991–2002 | 18 | 87 (13/15) |
| Adesanya et al 46 | 1996–1999 | 12 | 81 (17/21) |
| Hintz et al 25 | 1995–1998 | 18–22 | 51 (119/234) |
| Soraisham et al 26 | 1995–2000 | 36 | 24 (11/46) |
| Bassler et al 47 | 1996–1998 | 18 | 41 (30/74) |
| Arnold et al 48 | 1992–1995 | 36 | 49 (20/41) |
| Koivusalo et al 49 | 1986–2006 | 60 | 88 (21/24) |
| Lodha et al 27 | 1997–1998 | 24–28 | 20 (2/10) |
| Martin et al 28 | 2002–2004 | 24 | 38 (38/101) |
| Saldir et al 50 | 2002–2006 | 25–85 | 67 (8/12) |
| Maitre et al 51 | 1998–2004 | 18–36 | 84 (16/19) |
| Ta et al 30 | 1996–2002 | 119 | 53 (10/19) |
| Dilli et al 31 | 2007–2009 | 18–24 | 55 (11/20) |
| Pike et al 39 | 1994–2000 | 84 | 56 (64/114) |
| Adams-Chapman et al 52 | 2006–2008 | 18 | 21 (27/128) |
| Ganapathy et al 40 | 2002–2003 | 6–36 | 25 (26/105) |
| Wadhawan et al 12 | 2000–2005 | 18–22 | 57 (109/191) |
| Hayakawa et al 33 | 2003–2012 | 18 | 61 (11/18) |
| Fullerton et al 11 | 1999–2012 | 18–24 | 31 (267/866) |
| Allendorf et al 36 | 2006–2013 | 24 | 8 (3/37) |
| Total (n=31 studies) | 40 (952/2403) |