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Table 6 PPD over time; comparison with the 1st measurement (0 = Baseline), the measurements being made within a period of 10 years. Number of measurement points (n)

From: Dental implants in patients suffering from systemic sclerosis: a retrospective analysis of clinical outcomes in a case series with 24 patients

       Comparison with Baseline*
Period n Mean Sd Median Min–Max Difference 95% CI p value
Baseline 200 2.6 0.6 3.0 0.0–4.0   
 ≤ 1 Y 146 2.5 0.6 2.5 0.0–4.0 − 0.02 − 0.11–0.07 0.654
 ≤2 Y 112 2.6 0.6 3.0 0.0–4.0 0.05 − 0.05–0.15 0.343
 ≤3 Y 124 2.5 0.6 2.0 0.0–4.0 0.04 − 0.05–0.14 0.401
 ≤4 Y 70 2.7 0.7 3.0 2.0–5.0 0.04 − 0.07–0.16 0.454
 ≤5 Y 118 2.5 0.7 2.0 0.0–4.0 − 0.06 − 0.16–0.04 0.224
 ≤6 Y 38 2.8 0.7 3.0 2.0–4.0 0.04 − 0.11–0.19 0.628
 ≤7 Y 70 2.4 0.6 2.0 2.0–4.0 − 0.06 − 0.18–0.05 0.277
 ≤8 Y 42 2.5 0.6 2.0 1.0–4.0 − 0.09 − 0.24–0.05 0.209
 ≤9 Y 52 2.6 0.6 2.0 2.0–4.0 0.12 − 0.01–0.25 0.074
 ≤10 Y 50 2.4 0.6 2.0 2.0–4.0 − 0.03 − 0.16–0.11 0.688
  1. Last measurement per implant and measurement point within the period are taken into account
  2. *Random effects linear regression adjusted for implant position