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Table 2 n = number of visits for all patients per practice with median [range] and mean ± SD (standard deviation)

From: Use of digital periodontal data to compare periodontal treatment outcomes in a practice-based research network (PBRN): a proof of concept

Practice

n visits

Median [range]

Mean ± SD

1

112

1 [1–7]

1.70 ± 1.15

2

1161

2 [1–33]

3.10 ± 3.49

3

3324

2 [1–45]

2.68 ± 4.08

4

107

1 [1–4]

1.52 ± 0.75

5

1151

2 [1–9]

2.79 ± 1.77

6

1043

1 [1–11]

2.09 ± 1.60

7

2406

2 [1–18]

3.10 ± 2.44

8

12,485

5 [1–29]

5.79 ± 4.52

9

457

1 [1–5]

1.62 ± 0.78