Table 4

Influence of body size and weight trajectory on mortality^{10,14,33–50}

WEIGHT TRAJECTORY	UNDERWEIGHT	NORMAL WEIGHT	OVERWEIGHT	OBESE			ELDERLY
WEIGHT TRAJECTORY	UNDERWEIGHT	NORMAL WEIGHT	OVERWEIGHT	CLASS 1	CLASS 2	CLASS 3	ELDERLY
Stable	Increased	Optimal	Optimal	Optimal	Increased	Increased	Optimal
Weight gain	Reduced	Optimal	Optimal	Increased	Increased	Increased	Optimal
Weight loss
• Intentional, healthy	Increased	Increased	Increased	Increased	Increased	Increased	Increased
• Intentional, morbidity	Increased	Increased	Increased	Reduced	Reduced	Reduced	Reduced
• Not intentional	Increased	Increased	Increased	Increased	Increased	Increased	Increased