Table 2

Association between study site characteristics and the risk of hypertension: crude and adjusted models

 Adjusted models
Incidence (95% CI)Crude modelModel 1Model 2Model 3
Per 100 person-yearsIRR (95% CI)IRR (95% CI)IRR (95% CI)IRR (95% CI)
Study site
 Lima5.91 (4.92–7.10)1 (reference)1 (reference)1 (reference)1 (reference)
 Urban Puno5.73 (4.33–7.59)0.98 (0.71–1.34)1.01 (0.71–1.43)1.01 (0.72–1.44)1.02 (0.72–1.45)
 Rural Puno5.19 (3.76–7.16)0.88 (0.62–1.26)0.80 (0.55–1.16)0.83 (0.57–1.21)0.99 (0.68–1.45)
 Tumbes9.88 (8.52–11.5)1.67 (1.34–2.08)1.75 (1.39–2.19)1.79 (1.41–2.26)1.76 (1.39–2.23)
Site altitude
 Low7.81 (6.96–8.77)1 (reference)1 (reference)1 (reference)1 (reference)
 High5.49 (4.44–6.78)0.71 (0.56–0.89)0.65 (0.51–0.82)0.67 (0.52–0.85)0.74 (0.58–0.95)
  • Bold estimates are statistically significant (p<0.05).

  • Model 1 was adjusted by sex, age, education level and socioeconomic status.

  • Model 2 was adjusted for sex, age, education level, socioeconomic status, daily smoking, heavy alcohol drinking, TV watching for 2+ hours per day, transport-related physical inactivity, fried food consumption and high-sugar beverage consumption.

  • Model 3 was adjusted for sex, age, education level, socioeconomic status, daily smoking, heavy alcohol drinking, TV watching for 2+ hours per day, transport-related physical inactivity, fried food consumption and high-sugar beverage consumption, body mass index and type 2 diabetes mellitus.

  • IRR, incidence rate ratios.