Table 4 HRsa and 95%cis of depressive symptoms and glaucoma associated with the volume of PA stratified by long-term exposure to PM2.5.

From: PM2.5 exposure modifies the association of physical activity with depressive symptoms and glaucoma in middle aged and elderly Chinese

Outcome

PA volume (MET-h/day)

P for trend

Quartile 1

(≤ 4.10)

Quartile 2

(>4.10–9.87)

Quartile 3

(>9.87–25.17)

Quartile 4

(>25.17)

Low PM2.5 (<35 µg/m3 )

     

Depressive symptoms

1.00

0.97 (0.89–1.07)

0.87 (0.79–0.97)

0.82 (0.77–0.87)

0.012

Glaucoma in participants with depressive symptoms

1.00

0.94 (0.28–3.19)

1.18 (0.31–4.52)

1.21 (0.38–3.84)

0.688

Glaucoma in participants without depressive symptoms

1.00

1.23 (0.85–1.76)

0.64 (0.40–1.03)

0.84 (0.58–1.23)

0.330

High PM2.5 (>35 µg/m3 )

     

Depressive symptoms

1.00

0.91 (0.75–1.11)

0.94 (0.75–1.16)

0.85 (0.70–1.03)

0.141

Glaucoma in participants with depressive symptoms

1.00

1.23 (0.81–1.85)

1.31 (0.83–2.08)

0.93 (0.61–1.41)

0.606

Glaucoma in participants without depressive symptoms

1.00

2.25 (0.95–5.33)

2.37 (0.99–5.67)

1.36 (0.73–2.53)

0.101

  1. aCox proportional hazard model, and adjusted for age, sex, education level, marital status, residence, body mass index, disability in activities of daily living, chronic disease, smoking status, drinking status, living standard, heating fuel, cooking fuel, temperature, and PM2.5 (for the association with PA volume).
  2. Abbreviations: HRs, hazard ratios; CIs, confidence intervals; PA, physical activity; PM2.5, particulate matter with aerodynamic diameter < 2.5 μm; MET, metabolic equivalent; µg/m3, micrograms per cubic meter.
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