Cell-Phone Use and Self-Reported Hypertension: National Health Interview Survey 2008

Table 3

Association between cell-phone use and hypertension by age groups.

Cell-phone use	Sample size	Weighted prevalence, %	Age-adjusted OR (95% CI)	Multivariable OR (95% CI)*
Age < 60 years (𝑛=15336)
Cell-phone nonusers	6600	20.55	1 (Referent)	1 (Referent)
Predominantly landline users	1938	26.83	0.93 (0.80–1.07)	0.98 (0.84–1.16)
Dual users of cell phone and landline	4183	21.04	0.77 (0.68–0.88)	0.85 (0.74–0.99)
Predominantly cell-phone users	2615	18.05	0.73 (0.63–0.84)	0.82 (0.70–0.96)
P (trend)			<.0001	.004
Age ≥ 60 years (𝑛=5799)
Cell-phone nonusers	2590	63.71	1 (Referent)	1 (Referent)
Predominantly landline users	1668	61.81	1.00 (0.86–1.16)	1.16 (0.88–1.53)
Dual users of cell phone and landline	1237	58.04	0.87 (0.74–1.01)	0.99 (0.75–1.32)
Predominantly cell-phone users	304	54.61	0.77 (0.58–1.02)	0.88 (0.61–1.27)
P (trend)			.02	.1

*Adjusted for sex (female or male), ethnicity (non-Hispanic white, non-Hispanic blacks, Mexican Americans, or others), smoking categories (never, former, or current), alcohol intake (never drinker, former drinker, current light drinker, current moderate drinker, current heavy drinker, or unknown drinking status), body mass index (kg/m²), education (<high school, high school, or >high school), landline use (absent or present), and moderate physical activity (times/week); P interaction = 0.99.
^†All estimates were weighted to account for the complex survey design and survey nonresponse, using the sample adult record weight, to represent the U.S. civilian noninstitutionalized population aged ≥18 years.