. Author manuscript; available in PMC: 2007 Sep 27.

Published in final edited form as: J Periodontol. 2006 May;77(5):821–825. doi: 10.1902/jop.2006.050193

Table 2.

Multivariate Linear Regression Analysis Relating Periodontitis With Log Plasma CRP Levels (mg/l) Measured in Early Pregnancy^*

	Adjusted Mean CRP^† (SE)
Model	Periodontitis (≥1 site with alveolar bone loss ≥3 mm)	No Periodontitis (<1 site with alveolar bone loss ≥3 mm)	Difference (%) (95% CI)	P Value	R²
All participants (33 cases; 63 controls)	2.46 (0.52)	1.49 (0.22)	65.4 (−2.2, 179.8)	0.06	0.27
Restricted to participants whose radiographs were taken before blood collection (28 cases; 54 controls)	2.43 (0.58)	1.43 (0.24)	69.7 (−5.7, 205.4)	0.08	0.31

Adjusted for gestational age at blood collection (weeks), age (years), race/ethnicity (white versus other), completion of college education (yes/no), annual household income more than $70,000 (yes/no), pre-pregnancy BMI (kg/m²), and alcohol intake at first trimester of pregnancy (g/day).

^†

Adjusted means in multivariate model were computed using least square means procedures, holding all covariates to their average values, and back-transformed to original scale.