Table 3.

Mean Language Development in Months (Equivalent Age − Real Age) and Patient Characteristics

NumberVTWWReynell T = 0Reynell T = 6Reynell T = 12Reynell Δ12Schlichting T = 0Schlichting T = 6Schlichting T = 12Schlichting Δ12
Groups
 VT group9393−.91.11.871.78−2.49−2.13−1.271.35
 WW Group9494−.31.51.59.77−1.97−1.06−.161.88
Sex
 Male1105555−.94.01.361.28−2.52−2.30−1.391.24
 Female773839−.14.721.231.27−1.79−.58.172.12
Eduction mother
 Low462323−1.77−1.93−2.14−.43−3.07−3.79−3.95−1.06
 Middle924547−.45.521.191.56−1.85−1.31−.481.55
 High492524.262.142.772.47−2.16−.021.914.02
Season at T = 0
 Spring432023−1.19.38−.48.71−2.44−1.98−1.93.51
 Summer472324−1.21−.49.271.56−2.60−2.05−1.951.34
 Autumn593128.27.251.52.96−1.71−1.11.311.85
 Winter381919−.611.271.502.08−2.39−1.32.472.76
Age at T = 0
 <20 mo1457273−.46.74.881.29−2.02−1.21−.811.34
 ≥20 mo422121−1.14−1.18.221.22−2.90−2.90−.332.69
District
 11174.091.911.731.64−1.45−1.45−.10.80
 21256263−.69.23.921.50−2.15−2.15−.242.14
 3251312−.84.52−.38.33−2.43−2.43−2.75.23
 4261115−.35−.16.45.95−2.69−2.69−1.181.32
IQ
 Low663531−2.68−2.47−2.48.24−4.30−4.30−4.27.21
 Middle622933−.68.581.732.29−2.16−2.16−.362.18
 High5828301.813.213.351.42−.03−.032.532.45
  •  The language scores over the subgroups of the educational level of the mother as well as over the subgroups of the IQ of the child were significant (P < .05) for all measurements.