Table 4 Random intercept models for reduction in PD and CAL

 Gender

−0.006(0.155)

0.068(0.131)

−0.130(0.125)

−0.869(0.267)

−0.549(0.188)

−0.517(0.265)

 Age

0.005(0.005)

0.006(0.005)

0.008(0.005)

0.011(0.011)

0.002(0.009)

−0.009(0.009)

 BMI

0.010(0.016)

0.018(0.012)

−0.000(0.015)

−0.079(0.033)

−0.012(0.020)

−0.041(0.025)

 Smokers

−0.088(0.150)

0.099(0.129)

−0.068(0.135)

−0.780(0.230)

−0.866(0.224

−0.630(0.242

 Socio-enconomic

0.043(0.054)

0.075(0.044)

0.045(0.061)

−0.033(0.127)

0.039(0.092)

0.035(0.104)

 Education background

0.009(0.101)

−0.041(0.079)

−0.109(0.098)

−0.013(0.210)

−0.061(0.138)

0.091(0.175)

 Stress-experience

−0.290(0.010)

−0.268(0.076)

−0.389(0.087)

−0.190(0.183)

−0.154(0.156)

−0.093(0.168)

 Number of missing teeth

−0.014(0.029)

0.004(0.024)

−0.021(0.043)

0.015(0.070)

−0.036(0.052)

−0.033(0.819)

 % of sites with plaque at baseline

−0.407(0.399)

−0.240(0.308)

−0.137(0.417)

−1.326(0.962)

−0.876(0.821)

−1.302(0.642)

 % of sites with BOP at baseline

−0.189(0.440)

−0.005(0.238)

0.068(0429)

1.162(0.740)

0.907(0.615)

0.923(0.008)

 % of sites with PD ≥ 5 mm at baseline

1.43(0.467)

2251(0.363)

1.468(0.495)

0.647(0.703)

1399(0.592)

1.032(0.743)

 Tooth position

−0.062(0.035)

−0.080(0.032)

−0.047(0.039)

−0.125(0.049)

−0.136(0.039)

−0.062(0.045)

 Mobility

0.211(0.057)

0.158(0.048)

0.190(0.054)

0.115(0.059)

0.057(0.070)

0.161(0.071)

 BOP at baseline

0.607(0.050)

0.563(0.051)

0.585(0.059)

0.542(0.073)

0.581(0.062)

0.691(0.065)

 Plaque at baseline

0.088(0.045)

0.056(0.048)

0.036(0.048)

−0.009(0.067)

0.078(0.062)

0.064(0.063)

 Surface of tooth

0.254(0.030)

0.244(0.031)

0.202(0.031)

0.470(0.048)

0.547(0.045)

0.572(0.044)

 Subject

0.08

0.04

0.07

0.31

0.21

0.25

 Tooth

0.15

0.14

0.16

0.34

0.28

0.30

 Site

1.17

1.17

1.33

2.16

2.07

2.06

 Patient

50%

79%

65%

40%

48%

38%

 Tooth

25%

22%

20%

3%

7%

3%

 Site

7%

6%

6%

4%

8%

10%