Table 2.

Age at First Parental Concern and Regression in Pre- and Post-MMR Samples

MFS
Sample
MHC
Sample
Epidemiological Stafford SamplePValue
n986896
Birth period1954–19791987–19961992–1995
MMR statusPre-MMRPost-MMRPost-MMR
Age at first parental concern in months (Embedded Image[SD])19.5 (13.6)19.2 (8.8)19.3 (8.7)NS
Regression
Probable14 (14.3)7 (7.3)NS
Definite4 (4.1)8 (8.3)
Any18 (18.4)15 (15.6)NS
  • NS indicates not significant. }