Table 5 Subgroup analysis of association between Dietary Inflammatory index (DII) and bone mineral content (BMC)by BMI groups among adults

Underweight

DII continuous

0.005 (− 0.069,0.079)

0.889

 − 0.007 (− 0.047, 0.032)

0.702

0.002 (− 0.035, 0.038)

0.944

DII tertile

 Tertile 1

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Ref

Ref

 Tertile 2

0.396 (0.066,0.727)

0.021

0.252 (0.020, 0.484)

0.035

0.274 (0.073, 0.475)

0.010

 Tertile 3

 − 0.129 (− 0.444,0.185)

0.399

 − 0.134 (− 0.376, 0.108)

0.252

 − 0.107 (− 0.332, 0.118)

0.334

Normal weight

DII continuous

 − 0.039 (− 0.064, − 0.013)

0.003

 − 0.02 (− 0.037, − 0.002)

0.026

 − 0.013 (− 0.031, 0.004)

0.133

DII tertile

 Tertile 1

Ref

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 Tertile 2

 − 0.013 (− 0.116, 0.089)

0.800

0.009 (− 0.064, 0.082)

0.815

0.026 (− 0.047, 0.098)

0.478

 Tertile 3

 − 0.215 (− 0.331, − 0.099)

 < 0.001

 − 0.1 (− 0.182, − 0.018)

0.017

 − 0.07 (− 0.154, 0.014)

0.101

Overweight

DII continuous

 − 0.09 (− 0.111, − 0.069)

 < 0.001

 − 0.037 (− 0.052, − 0.021)

 < 0.001

 − 0.034 (− 0.050, − 0.017)

 < 0.001

DII tertile

 Tertile 1

Ref

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Ref

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 Tertile 2

 − 0.148 (− 0.240, − 0.055)

0.002

 − 0.066 (− 0.139, 0.006)

0.071

 − 0.064 (− 0.138, 0.009)

0.083

 Tertile 3

 − 0.418 (− 0.517, − 0.318)

 < 0.001

 − 0.181 (− 0.255, − 0.108)

 < 0.001

 − 0.058 (− 0.113, − 0.004)

0.042

Obese

DII continuous

 − 0.088 (− 0.108, − 0.067)

 < 0.001

 − 0.035 (− 0.055, − 0.016)

 < 0.001

 − 0.03 (− 0.049, − 0.011)

0.003

DII tertile

 Tertile 1

Ref

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Ref

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Ref

Ref

 Tertile 2

 − 0.152 (− 0.243, − 0.060)

0.001

 − 0.049 (− 0.116, 0.017)

0.144

 − 0.039 (− 0.105, 0.026)

0.236

 Tertile 3

 − 0.333 (− 0.428, − 0.238)

 < 0.001

 − 0.112 (− 0.202, − 0.021)

0.016

 − 0.09 (− 0.177, − 0.003)

0.042