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

Table 6

Association between cell-phone use and hypertension by body mass index (BMI) categories.

Cell-phone use	Sample size	Weighted prevalence, %	Age-adjusted OR (95% CI)	Multivariable OR (95% CI)*
BMI < 25 kg/m^2 (𝑛=7,691)
Cell-phone nonusers	3540	23.39	1 (Referent)	1 (Referent)
Predominantly landline users	1136	31.78	0.95 (0.77–1.16)	1.05 (0.80–1.37)
Dual users of cell phone and landline	1889	17.95	0.79 (0.64–0.97)	0.86 (0.67–1.12)
Predominantly cell-phone users	1126	11.55	0.62 (0.48–0.81)	0.69 (0.51–0.94)
P (trend)			.0002	.007
BMI ≥ 25 kg/m^2 (𝑛=13,444)
Cell phone nonusers	5650	38.55	1 (Referent)	1 (Referent)
Predominantly landline users	2470	48.18	0.94 (0.83–1.06)	0.98 (0.85–1.14)
Dual users of cell phone and landline	3531	35.66	0.84 (0.75–0.94)	0.89 (0.77–1.03)
Predominantly cell-phone users	1793	28.33	0.84 (0.73–0.97)	0.89 (0.76–1.04)
P (trend)			.0007	.05

*Adjusted for age (years), 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), education (<high school, high school, or >high school), landline use (absent or present), and moderate physical activity (times/week); P interaction =  .07.
^†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.