. Author manuscript; available in PMC: 2021 Dec 11.

Published in final edited form as: Pediatr Res. 2021 Feb 9;90(5):1044–1051. doi: 10.1038/s41390-020-01309-1

Table 2.

Proportion of patients ≥29 months of age who developed migraine if migrainous features were or were not present during benign paroxysmal torticollis (BPT) episodes.

Symptom	Proportion of patients who developed migraine
Symptom	Symptom present	Symptom absent	p value (Chi-squared)
Photophobia	10/28 (36%)	4/18 (22%)	0.33
Phonophobia	7/12 (58%)	7/34 (21%)	0.02
Vomiting	13/36 (36%)	1/10 (10%)	0.11
Motion sensitivity	9/24 (38%)	5/22 (23%)	0.28
Photophobia and phonophobia	6/11 (55%)	8/35 (23%)	0.05
Photophobia, phonophobia, and motion sensitivity	6/10 (60%)	8/35 (22%)	0.02
Any migrainous symptom	13/38 (34%)	1/8 (13%)	0.23
Family history of migraine	14/42 (33%)	0/4 (0%)	0.17

Analysis was restricted to children ≥29 months of age as this was the earliest age when migraine was reported.