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.