In ‘Obesity Paradox,’ Thinner May Mean Sicker

In 'Obesity Paradox,' Thinner May Mean Sicker

Source: New York Times

"… Dr. Neil Ruderman, an endocrinologist at Boston University School of Medicine, was the first to identify a condition he called "metabolically obese normal weight," in 1981. Such people have weights in the normal range on the B.M.I. chart but also have metabolic abnormalities, including high levels of insulin resistance and triglycerides; they tend to carry fat around the middle, which is more apt to affect the heart, liver and other organs than fat in the hips and thighs…."
This evidence is not new. I post here to reminder myself about this called 'paradox' (not a paradox to me).

Geriatric Obesity - a Special Issue of International Journal of Obesity

Geriatric Obesity - a Special Issue of International Journal of Obesity

International Journal of Obesity just released a special issue on geriatiric obesity. It concluded that more research is needed to clarify the definition, to evaluate the tiem of treatment, and  strategies treatment of obesity in older adults.
Scoping review report: obesity in older adults

Abstract | Full Text

Obesity in the elderly: an emerging health issue Full Text | PDF

Tips of Using PortableApps

Tips of Using PortableApps

PortableApps.com is the world's most popular portable software solution allowing you to take your favorite software with you. The launcher is not as good as I expect; I am using PStart  and manually change some 'ini' files to meet my needs:

• How to disable the splash screen of AppNamePortable:
• go to "\PortableApps\AppNamePortable\Other\Source".
• open "AppNamePortable.ini".
• change  " DisableSplashScreen=False" into  " DisableSplashScreen=True ", and save change.
• copy  "AppNamePortable.ini" into "PortableApps\AppNamePortable".
• How to remove PortableApps icon from task bar (to minimize to tray).
• go to "\PortableApps\PortableApps.com\Data\".
• open "PortableAppsMenu.ini".
• under [DisplayOptions], add "Windows7TaskbarIcon=false".
• How to set global hot key (11.1 and up)
• by default, the platform uses a global hot key of Ctrl-Alt-Space to show the menu from other apps. 
• open "\PortableApps\PortableApps.com\Data\PortableAppsMenu.ini"
• changing the line GlobalHotKey=CTRL-ALT-SPACE to another value. Valid entries are CTRL-ALT-SPACE, CTRL-ALT-P, CTRL-ALT-M, CTRL-SPACE, WIN-ALT-SPACE and DISABLED.
• How to set autorun modification detection
• open "\PortableApps\PortableApps.com\Data\PortableAppsMenu.ini"
• changing the line AutoRun=true to AutoRun=false in the [Protection] section. Note that some antivirus products may show an alert when an autorun.inf is read.
• Q & A of PortableApps.com Platform and Suite Support
• ...

How to Combine the Results after the Multiply Imputation

How to Combine the Results after the Multiple Imputation

The overall estimate of Q is simply the average of the M estimates from M multiple imputed datasets.

The overall variance of is

Where the average variance of M within-imputed datasets () is and the variance between-imputed dataset is

The overall degree of freedom (df) is

Where the df of imputed datasets is and the df of observed data is


If the df of the complete data (df_completed) are large [Notes: for complex sampling design, df_complete = # of PSU - # of Strata], the overall degree of freedom is

Then, the confidence intervals can be

The estimated percent rate of missing information for Q is

Notes: Usually M = 5 or 10 is enough, but the M is better to be great than the percent rate of missing information.