Table 6.

Spearman correlations between headache-attributed disability¹ and lost household worktime (HALT questions 3 + 4) by headache type and country

Country	Migraine			Probable medication-overuse headache
	N	rs	p	N	rs	p
China	203	0.27	< 0.001	–	–	–
Ethiopia	479	0.28	< 0.001	23	0.05	0.82
India	372	0.05	0.30	27	−0.08	0.69
Lithuania + Luxembourg	543	0.30	< 0.001	58	−0.03	0.85
Nepal	674	0.12	0.003	53	0.17	0.22
Pakistan	483	0.23	< 0.001	104	−0.04	0.72
Russia	108	0.27	0.005	64	0.39	0.002
Spain	355	0.39	< 0.001	54	0.19	0.17

HALT: Headache-Attributed Lost Time questionnaire. ¹ Calculated as proportion of time in ictal state*disability weight from GBD2015 [49]; significant p-values are emboldened.