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. 2019 Apr 22;80(1):163–185. doi: 10.1177/0013164419843576

Table 6.

Statistics on Self-Generated Identification Code (SGIC) Length for Perfect Matches and One-Off Matches.

Count of elements Average match (perfect) SD match (perfect) N (studies) Months range
3 0.554 0.074 4 6-18
4 0.564 0.085 4 6-18
5 0.810 0.084 6 0.5-4
6 0.920 0.032 2 0.25
7 0.568 0.136 6 1-12
8+ 0.580 0.069 3 12
Count of elements Average match (one-off) SD match (one-off) N (studies) Months range
4 0.589 0.077 3 6-18
5-6 0.927 0.102 3 0.25-0.5
7 0.842 0.063 14 1-20
8+ 0.757 0.072 3 12

Note. For N (studies); one article can have multiple studies as each Wave X to Wave Y is counted separately. Excludes Wilson et al. (2010) data.