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Table 5 The risk of low back pain according to metabolic syndrome, and metabolic syndrome and depressive symptoms stratified by age

From: Estimating the impact of metabolic syndrome on low back pain and the joint effects of metabolic syndrome and depressive symptoms on low back pain: insights from the China Health and Retirement Longitudinal Study

Subgroups

Cross-sectional

Longitudinal

OR (95% CI)

P for interaction

HR (95% CI)

P for interaction

Age

ÌýÌýÌýÌýÌý

45–64 years

MetS a

Ìý

1.000

Ìý

1.000

Ìý

No

1.00 [Reference]

Ìý

1.00 [Reference]

Ìý
Ìý

Yes

0.78 (0.67–0.91) **

Ìý

0.90 (0.80–1.02)

Ìý

65 + y±ð²¹°ù²õ

MetS a

ÌýÌýÌýÌý
Ìý

No

1.00 [Reference]

Ìý

1.00 [Reference]

Ìý
Ìý

Yes

0.95 (0.74–1.22)

Ìý

0.89 (0.70–1.12)

Ìý

Age

ÌýÌý

1.000

Ìý

0.177

45–64 years

Combined MetS and DS b

ÌýÌýÌýÌý
Ìý

No ²Ñ±ð³Ù³§â€‰+ N´Ç¶Ù³§

1.00 [Reference]

Ìý

1.00 [Reference]

Ìý
Ìý

No ²Ñ±ð³Ù³§â€‰+ D³§

2.21 (1.81–2.70) ***

Ìý

1.61 (1.35–1.92) ***

Ìý
Ìý

²Ñ±ð³Ù³§â€‰+ N´Ç¶Ù³§

0.69 (0.56–0.85) ***

Ìý

0.89 (0.76–1.03)

Ìý
Ìý

²Ñ±ð³Ù³§â€‰+ D³§

1.92 (1.56–2.37) ***

Ìý

1.50 (1.26–1.80) ***

Ìý

65 + y±ð²¹°ù²õ

Combined MetS and DS b

ÌýÌýÌýÌý
Ìý

No ²Ñ±ð³Ù³§â€‰+ N´Ç¶Ù³§

1.00 [Reference]

Ìý

1.00 [Reference]

Ìý
Ìý

No ²Ñ±ð³Ù³§â€‰+ D³§

2.71 (1.87–3.94) ***

Ìý

2.40 (1.69–3.40) ***

Ìý
Ìý

²Ñ±ð³Ù³§â€‰+ N´Ç¶Ù³§

0.86 (0.58–1.27)

Ìý

1.05 (0.77–1.43)

Ìý
Ìý

²Ñ±ð³Ù³§â€‰+ D³§

2.72 (1.88–3.94) ***

Ìý

1.72 (1.20–2.44) **

Ìý
  1. Abbreviation DS, depressive symptoms; OR, odds ratio; HR, hazards ratio; CI, confidence interval; MetS, metabolic syndrome; DS, depressive symptoms
  2. a Adjusted for age, sex, residence, education level, marital status, smoking, alcohol consumption, social activity, functional disability, number of chronic diseases, body mass index, and depressive symptoms, except itself
  3. b Adjusted for age, sex, residence, education level, marital status, smoking, alcohol consumption, social activity, functional disability, number of chronic diseases, and body mass index, except itself
  4. **P < 0.01, ***P &±ô³Ù; 0.001