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Table 3 Subgroup analysis and interaction results

From: Association between conicity index (C-index), relative fat mass (RFM), and osteoarthritis (OA): evidence from NHANES 2003–2018

Characteristic

C-index (quartile)

RFM (quartile)

 

OR (95%CI)

OR (95%CI)

Gender

 Male

1.33 (1.20, 1.47)***

1.33 (1.20, 1.49)***

 Female

1.10 (1.03, 1.17) **

1.26 (1.12, 1.41)***

 P for interaction

0.229

0.663

Age

 > = 60

1.12 (1.05, 1.20)**

1.25 (1.13, 1.37)***

 40–59

1.18 (1.08, 1.29)***

1.26 (1.10, 1.46)***

 20–39

1.25 (1.07, 1.48)**

1.65 (1.32, 2.06)***

 P for interaction

0.023

0.093

Race

 Mexican American

1.38 (1.17, 1.62)***

1.38 (1.13, 1.69)**

 Non-Hispanic Black

1.21 (1.10, 1.34)***

1.56 (1.36, 1.78)***

 Non-Hispanic White

1.13 (1.06, 1.20)***

1.24 (1.13, 1.36)***

 Other

1.38 (1.08, 1.77)*

1.47 (1.03, 2.09)*

 Other Hispanic

1.45 (1.21, 1.74)***

1.48 (1.10, 1.99)**

 P for interaction

0.019

0.631

Depression

 Yes

1.05 (0.91, 1.21)

1.35 (1.09, 1.68)**

 No

1.18 (1.11, 1.25)***

1.28 (1.18, 1.39) ***

 P for interaction

0.155

0.127

Diabetes

 Yes

1.17 (1.03, 1.34)*

1.46 (1.21, 1.75) ***

 No

1.15 (1.09, 1.22)***

1.27 (1.16, 1.38)***

 P for interaction

0.338

 < 0.001

Hypertension

 Yes

1.12 (1.04, 1.20)**

1.24 (1.12, 1.38)***

 No

1.20 (1.11, 1.29)***

1.33 (1.19, 1.50) ***

 P for interaction

0.022

0.149

Hyperlipemia

 Yes

1.16 (1.10, 1.23)***

1.28 (1.18, 1.39)***

 No

1.17 (0.98, 1.41)

1.34 (1.03, 1.74)*

 P for interaction

0.563

0.989

Physical activity

 High

1.22 (1.10, 1.35)***

1.42 (1.21, 1.67)***

 Low

1.15 (1.08, 1.22)***

1.24 (1.14, 1.36)***

 P for interaction

0.267

0.185

Alcohol consumption

 Heavy

1.08 (0.90, 1.30)

1.19 (0.94, 1.50)

 Moderate

1.21 (1.07, 1.38)**

1.31 (1.07, 1.60)**

 Mild

1.19 (1.11, 1.28)***

1.28 (1.15, 1.41)***

 Non-drinker

1.07 (0.95, 1.22)

1.35 (1.12, 1.62)**

 P for interaction

0.437

0.188

  1. A P value for interaction < 0.05 indicates the presence of an interaction and the subgroup analysis was conducted under the fully adjusted Model 4
  2. * P < 0.05, ** P < 0.01, and *** P < 0.001