Table 1.
The baseline characteristics of the included studies.
| Study | Bruni et al. [11] | Jan and Al-Buhairi [20] | Gelfand et al. [12] | Romanello et al. [10] | Marugán-Miguelsanz et al. [21] | Sillanpaa and Saarinen [22] | Tabrizi et al. [23] |
|---|---|---|---|---|---|---|---|
| Age | NA | 7–12 y | 2–12 w | 6–18 y | 18–45 y | 18 y | 5–15 y |
| Type | Prospective | Prospective | Retrospective | Prospective | Retrospective | RCT | Retrospective |
| Period | 1994.09–1995.09 | 1998.08–1998.12 | 2010.07–2011.09 | 2012.04–2012.06 | NA | NA | 2015–2016 |
| Region | Italy | Saudi Arabia | USA | France and Italy | Spain | Finland | Iran |
| No. | NA | NA | NA | NA | NA | NA | NA |
| Con. | 893 | 29 | 126 | 471 | 29 | 658 | 123 |
| Migraine | 164 | 29 | 28 | 208 | 7 | 129 | 41 |
| TTH | 119 | NA | NA | 120 | NA | NA | NA |
| Colic | NA | NA | NA | NA | NA | NA | NA |
| Con. | 240 | 6 | 14 | 125 | 9 | 74 | 44 |
| Migraine | 63 | 15 | 8 | 151 | 3 | 22 | 17 |
| TTH | 30 | NA | NA | 42 | NA | NA | NA |
| Diagnosis of infant colic | Medical history from parents | Medical history from parents | Follow-up visiting | Medical history from parents | Medical history from patients | Follow-up visiting | Medical history from patients |
| Study quality | 6 | 7 | 8 | 7 | 6 | 8 | 6 |
NA: not applicable, y: year, w: week.