Table 2.
Results from multivariable negative binomial regression models for the relationship between presence of metabolic syndrome and extent of severe periodontal disease (counts of tooth-sites per person with CAL≥6 mm) among a study population of Gullah African Americans with type 2 diabetes (N=283).
| Parameter | Full multivariable model (Deviance/df = 0.90) | Final multivariable model (Deviance/df = 0.89) | ||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| β | SE | P | RR and 95% CI | β | SE | P | RR and 95% CI | |
| Intercept | −0.28 | 2.63 | 0.92 | -------- | −2.41 | 1.15 | 0.04 | -------- |
| Metabolic syndrome :yes | 0.98 | 0.47 | 0.04 | 2.66 (1.05-6.72) | 1.02 | 0.47 | 0.03 | 2.77 (1.11-6.93) |
| HbA1c ≥7% | 0.34 | 0.30 | 0.26 | 1.41 (0.78-2.55) | 0.43 | 0.29 | 0.14 | 1.54 (0.87-2.70) |
| Total teeth | −0.10 | 0.02 | <.0001 | 0.90 (0.86-0.95) | −0.11 | 0.02 | <.0001 | 0.90 (0.86-0.94) |
| BMI: 25-30 (kg/m2, overweight) | 0.24 | 0.53 | 0.65 | 1.27 (0.45-3.56) | 0.17 | 0.52 | 0.75 | 1.18 (0.42-3.29) |
| BMI: ≥30 (kg/m2, obese) | −0.50 | 0.50 | 0.32 | 0.61 (0.23-1.62) | −0.52 | 0.50 | 0.30 | 0.60 (0.22-1.60) |
| BMI: data missing | 0.86 | 0.79 | 0.28 | 2.36 (0.50-11.05) | 0.84 | 0.79 | 0.29 | 2.32 (0.49-10.92) |
| Gender: female | −0.90 | 0.34 | <.01 | 0.40 (0.21-0.79) | −0.85 | 0.34 | 0.01 | 0.43 (0.22-0.83) |
| Smoking status: current | 0.78 | 0.41 | 0.05 | 2.19 (0.99-4.85) | 0.77 | 0.41 | 0.06 | 2.15 (0.97-4.78) |
| Smoking status: past | −0.06 | 0.38 | 0.88 | 0.95 (0.44-2.01) | −0.07 | 0.38 | 0.85 | 0.93 (0.44-1.97) |
| Age (years) | 0.02 | 0.02 | 0.17 | 1.02 (0.99-1.05) | 0.02 | 0.02 | 0.21 | 1.02 (0.99-1.05) |
| CRP (mg/ml as loge) | 0.26 | 0.14 | 0.06 | 1.30 (0.99-1.71) | 0.26 | 0.14 | 0.06 | 1.30 (0.99-1.71) |
| Serum albumin (g/dl as loge) | −1.75 | 1.91 | 0.36 | 0.17 (<0.01-7.42) | ----- | ----- | ----- | ----- |
| Dispersion parameter | 4.32 | 0.51 | ----- | ----- | 4.35 | 0.51 | ----- | ----- |
SE = Standard error, RR= rate ratio, CI= confidence interval, P ≤ 0.05