APPENDIX 1 A study examined families in three major cities in Thailand. The study focused on infant development in the context of the backgrounds and living conditions of families. 269 observations with complete observations are included in this analysis. Investigators studied predictors of infant behavioral characteristics. One of the characteristics "Excitability" was measured as the number of times an infant acted "excited" in a on hour period of time. Potential predictors included the baby's gestational age (gestation_weeks), the quality of the families living conditions (qols), mother's language-free nonverbal intelligence (TONI4_INDEX), the numbers of years of education of the father (FatherYrs Educ), the number of preterm births the mother had experienced (Preterm), and infant sex (0=female, 1=male). Below is relevant SAS Output. 0.0150 The GENMOD Procedure Model Information 0.0748 Data Set Distribution Link Function Dependent Variable WORK.ALL MERGED Poisson Log Excitability Number of Observations Read320 Number of Observations Used269 Missing Values Parameter Information ParameterEffect Prm1 Intercept Prm2 gestation_weeks Prm3 Qols Prm4 TONI4 INDEX Prm5 Father YrsEduc Prm6 Preterm Prm7 Infantsex 51 Criteria For Assessing Goodness Of Fit Criterion Deviance Scaled Deviance DF ValueValue/DF 262 577.3168 2.2035 262 577.3168 2.2035 Pearson Chi-Square Scaled Pearson X2 Log Likelihood Full Log Likelihood AIC (smaller is better) 262 566.3297 2.1616 262 566.3297 2.1616 -248.4164 -463.6072 941.2145 AICC (smaller is better) 941.6436 966.3774 BIC (smaller is better) Algorithm converged. Analysis Of Maximum Likelihood Parameter Estimates Standard Wald 95% Confidence Wald Chi- Parameter DFEstimate Error Limits Square Pr> ChiSq Intercept 1 0.2324 1.8543 -3.4020 3.8667 0.02 0.9003 gestation_weeks 1 -0.0190 0.0474 -0.1120 0.0739 0.16 0.6881 qols 1 -0.1267 0.0958 -0.3145 0.0610 1.75 0.1858 TONI4 INDEX 1 0.0034 0.0072 -0.0106 0.0174 0.22 0.6366 Father YrsEduc 1 0.0454 0.0150 0.0160 0.0748 9.14 0.0025 Preterm 1 -0.8756 0.3012 -1.4660 -0.2853 8.45 0.0036 infantsex 1 0.0712 0.1102 -0.1448 0.2871 0.42 0.5184 Scale 0 1.0000 0.0000 1.0000 1.0000 Note: The scale parameter was held fixed.