Table 3 Subgroup analysis for the association between Mean Platelet Volume and periodontitis

Age(years)

0.2187

< 40

Ref

1.19 (1.05, 1.34)

0.0068

>=40, < 60

Ref

1.11 (1.03, 1.20)

0.0075

>=60

Ref

1.04 (0.94, 1.14)

0.4664

Gender

0.8798

Male

Ref

1.09 (1.01, 1.17)

0.0229

Female

Ref

1.08 (1.01, 1.16)

0.0361

Marital status

0.8701

Married/Living with a partner

Ref

1.06 (1.00, 1.13)

0.0598

Widowed/divorced/separated

Ref

1.10 (0.99, 1.22)

0.0853

Never married

Ref

1.06 (0.91, 1.24)

0.4525

Race

0.5525

Mexican American

Ref

1.11 (0.96, 1.28)

0.175

Non-Hispanic White

Ref

0.99 (0.91, 1.07)

0.8092

Non-Hispanic Black

Ref

1.06 (0.94, 1.18)

0.3446

Other

Ref

1.04 (0.93, 1.16)

0.458

Education level

0.3241

High and above

Ref

1.04 (0.98, 1.10)

0.1969

Below high school

Ref

1.11 (0.99, 1.24)

0.0704

PIR

0.1684

Middle income

Ref

1.02 (0.93, 1.12)

0.6193

Low income

Ref

1.13 (1.03, 1.25)

0.0119

High income

Ref

1.00 (0.91, 1.10)

0.959

BMI

0.0893

Not overweight

Ref

0.97 (0.88, 1.08)

0.6137

Overweight

Ref

1.07 (0.98, 1.17)

0.1177

Obesity

Ref

1.13 (1.04, 1.22)

0.0046

Smoking habit

0.9224

Never

Ref

1.07 (1.00, 1.15)

0.0429

Previous

Ref

1.10 (0.99, 1.22)

0.0708

Current

Ref

1.09 (0.96, 1.23)

0.1836

Drinking habit

0.2291

Never

Ref

1.08 (0.94, 1.24)

0.2822

Moderate

Ref

1.00 (0.90, 1.09)

0.9185

Heavy

Ref

1.11 (1.02, 1.21)

0.0139

Hypertension

0.4267

No

Ref

1.03 (0.95, 1.11)

0.4547

Yes

Ref

1.07 (1.00, 1.15)

0.0483

Diabetes

0.3322

No

Ref

1.03 (0.98, 1.09)

0.2499

Yes

Ref

1.12 (0.96, 1.30)

0.1443

CVD

0.5106

No

Ref

1.07 (1.01, 1.12)

0.0196

Yes

Ref

1.14 (0.94, 1.39)

0.1866