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Table 5 Association between per 0.1-unit increase in EVI and hypertension incidence, stratified by subgroup factors

From: The effects of greenness exposure on hypertension incidence among Chinese oldest-old: a prospective cohort study

Variables

Overall

High-level exposure

(n = 4454)

Low-level exposure

(n = 799)

HR(95% CI)

P for

interaction

HR(95% CI)

P for

interaction

Gender

 

Female

0.53 (0.41–0.68)

0.480

0.95 (0.32–2.87)

0.240

 

Male

0.55 (0.42–0.74)

 

0.64 (0.18–2.27)

 

Residence

 

Rural/Town

0.43 (0.35–0.54)

0.400

5.07 (0.20–13.01)

0.110

 

Urban

0.71 (0.31–1.60)

 

0.53 (0.23–1.26)

 

Region

 

Northern China

0.67 (0.39–1.17)

0.180

0.45 (0.15–1.33)

0.074

 

Southern China

0.39 (0.31–0.50)

 

1.05 (0.23–4.87)

 

Smoking status at present

 

No

0.48 (0.38–0.60)

0.410

0.77 (0.34–1.75)

0.890

 

Yes

0.52 (0.32–0.84)

 

1.65 (0.10–28.20)

 

Drinking status at present

 

No

0.53 (0.42–0.66)

0.130

0.55 (0.23–1.34)

0.095

 

Yes

0.48 (0.32–0.71)

 

1.14 (0.03–37.92)

 

Ongoing exercising habit

 

No

0.50 (0.39–0.62)

0.580

1.04 (0.36–3.02)

0.400

 

Yes

0.59 (0.42–0.84)

 

0.69 (0.23–2.07)

 

Leisure activity

Personal outdoor activities

 

Never/sometimes

0.47 (0.35–0.64)

0.990

3.85 (0.53–27.81)

0.310

 

At least once a month and more

0.58 (0.44–0.75)

 

0.79 (0.34–1.79)

 

Gardening

 

Never/sometimes

0.44 (0.35–0.55)

0.310

1.18 (0.49–2.85)

0.520

 

At least once a month and more

0.93 (0.37–2.34)

 

0.20 (0.03–1.40)

 
  1. Note:
  2. The associations were adjusted by age, living arrangement, PM2.5 concentration, regions, residence, gender, smoking, drinking, exercising, pension, marital status, education attainment, self-reported diabetes, personal outdoor activities, gardening, and BMI (unless stratified by the respective factor)