Table 3

OR of headaches by diet and sodium sequence

	OR (95%CI)	p Value
Sodium effects on the DASH diet
Intermediate vs high sodium	0.72 (0.51 to 1.01)	0.06
Low vs intermediate sodium	0.96 (0.68 to 1.37)	0.85
Low vs high sodium	0.69 (0.49 to 0.98)	0.04
Sodium effects on the control diet
Intermediate vs high sodium	0.81 (0.57 to 1.15)	0.24
Low vs intermediate sodium	0.86 (0.59 to 1.24)	0.42
Low vs high sodium	0.69 (0.49 to 0.99)	0.05
Diet effects (DASH vs control) at each sodium level
On high sodium	0.65 (0.37 to 1.12)	0.12
On intermediate sodium	0.57 (0.29 to 1.12)	0.10
On low sodium	0.64 (0.36 to 1.13)	0.12
Low sodium on DASH vs high sodium on control	0.64 (0.14 to 0.99)	0.05

Models adjusted for age, sex, race, site, systolic blood pressure, body mass index, smoking status and carryover effects from the previous period.