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Table 2 Review requiring 12 member months continuous enrollment per year

From: Future expenditure risk of silent members: a statistical analysis

  Count Retention Rate Count who had claims Count who were Silent PMPY Mean for cohorta and for claimants only PMPY Median for cohorta and for claimants only % > Top 5 % PMPY of All Members with 12 MM % > Top 1 % PMPY of All Members with 12 MM % > $100,000
Silent-members in 2009 238,180   0       
2010: 2009 Silent-members with 12 MM in 2010 198,632 83.40 % 89,475 109,157 Cohorta $1,116 Cohorta $0 1.22 % 0.26 % 0.10 %
     Claimants $2,477 Claimants $398 (n = 2432) (n = 509) (n = 205)
2011: 2009 Silent-members with 12 MM in 2010 and 2011 162,257 68.12 % 81,097 81,160 Cohorta $1,481 Cohorta $0 1.61 % 0.37 % 0.18 %
     Claimants $2,963 Claimants $439 (n = 2619) (n = 607) (n = 284)
  Count Retention Rate Count who had claims Count who became silent PMPY Mean PMPY Median % > Top 5 % PMPY of All Members with 12 MM % > Top 1 % PMPY of All Members with 12 MM % > $100,000
Low-Expenditure Members in 2009 121,700   121,700   $94.01 $95.27    
2009 Low-Expenditure Members with 12 MM in 2010 93,184 76.57 % 69,465 16,147 Cohorta $1,462 Cohorta $215 1.50 % 0.25 % 0.09 %
     Claimants $1,962 Claimants $383 (n = 1401) (n = 231) (n = 85)
2009 Low-Expenditure Members with 12 MM in 2011 76,772 63.08 % 57,755 12,298 Cohorta $1,590 Cohorta $150 1.92 % 0.35 % 0.17 %
Claimants $2,466 Claimants $433 (n = 1472) (n = 268) (n = 129)
  1. aCohort refers to the group of members in the reported year who originated in 2009 and for whom PMPY means were estimated using all individuals originally assigned to the silent-member or low-expenditure member cohort in 2009, regardless of whether they had claims in that particular year. Persons for whom mean PMPY estimations were calculated using only those individuals from the cohort who had claims during the specific year are referred