Table 1: Mean and Mean Changes in PD Gain and CAL Reduction at 3 and 6 Months, 1 and 2 Years Post- Er,Cr:YSGG Laser Treatment

Initial PD [mm] PD/ CAL Baseline 3 Months 6 Months 1 Year 2 Years
Mean SD Mean Δ SD Mean Δ SD Mean Δ SD Mean Δ SD
4 PD [mm] 4.0 - 2.9 1.1 0.8 2.7 1.3 0.6 2.9 1.1 0.7 3.0 1.0 0.8
CAL [mm] 4.1 0.4 2.8 1.2 0.8 2.7 1.3 0.8 2.9 1.1 0.8 3.1 0.9 1.0
5 PD [mm] 5.0 - 2.9 2.1 0.8 2.7 2.3 0.6 3.0 2.0 0.8 3.2 1.8 0.8
CAL [mm] 5.0 0.3 3.1 1.9 1.0 3.1 1.9 1.0 3.1 1.9 0.8 3.1 1.9 0.8
6 PD [mm] 6.0 - 2.9 3.1 0.5 2.8 3.2 0.5 3.1 2.9 0.6 3.3 2.7 0.7
CAL [mm] 6.0 0.2 3.1 2.9 1.0 3.0 3.0 0.8 3.3 2.7 0.8 3.2 2.8 0.8
7 PD [mm] 7.0 - 3.2 3.8 0.8 3.3 3.7 0.9 3.5 3.5 0.8 3.5 3.5 1.1
CAL [mm] 7.1 0.3 3.3 3.8 0.8 3.3 3.8 0.8 3.5 3.5 0.9 3.5 3.5 1.0
8 PD [mm] 8.0 - 3.5 4.5 0.8 3.4 4.6 0.8 3.5 4.5 0.7 3.6 4.4 1.2
CAL [mm] 8.1 0.2 3.4 4.6 0.8 3.4 4.6 0.8 3.7 4.3 0.8 3.4 4.6 1.1
9 PD [mm] 9.0 - 3.6 5.4 0.5 3.6 5.4 0.5 3.5 5.5 0.5 4.0 5.0 1.0
CAL [mm] 9.0 0.0 3.8 5.2 0.8 3.8 5.2 0.8 4.5 4.5 0.7 3.8 5.2 1.0
4-6 PD [mm] 5.0 0.8 3.0 2.0 1.1 2.8 2.2 1.0 3.0 2.0 1.0 3.2 1.8 1.1
CAL [mm] 5.0 0.8 3.1 1.9 1.2 3.0 2.0 1.1 3.2 1.8 1.0 3.1 1.9 1.1
7-9 PD [mm] 7.5 0.6 3.3 4.3 0.9 3.3 4.3 1.0 3.6 4.0 1.0 3.7 3.9 1.2
CAL [mm] 7.6 0.6 3.3 4.3 0.9 3.3 4.3 0.9 3.8 3.8 0.9 3.6 4.0 1.2