The Relationship between Infant Colic and Migraine as well as Tension-Type Headache: A Meta-Analysis

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.