Adjusted Predicted Symptoms of Depressed Mood and Somatic Complaints from Generalized Estimating Equations over Age Groups by Gender, Health and Retirement Study 1994–2014. Note. While the sadness models has all 178,003 observations, the malaise model has 177,444 observations due to item level missingness (295 missing on “could not get going”, 187 missing on “everything was an effort”, and 100 missing on “sleep was restless”, with 23 missing on more than one of these items).