It's best to memorise the definitions according to VCAA standards

The problem with memorising textbook definitions is that the definitions vary from textbook to textbook and there's no 100% guarantee that those definitions will get you the marks

Also, some definitions are "official" (e.g. theyre from the WHO or AIHW), so you need to memorise them accordingly

In the old study design, we had a nice mini glossary at the end with all the definitions for the key terms and we stuck to that

Unfortunately, your new study design for 2014 doesn't have the glossary at the back with the key terms

But I've mentioned below all the health status indicator definitions which the majority of students use (and which VCAA tend to approve of as they'd mentioned them in the previous study design)
Health: ‘A complete state of physical, social and mental wellbeing, and not merely the absence of disease or infirmity.’
Physical Health Relates to the efficient functioning of the body and its systems, and includes the physical capacity to perform tasks and physical fitness.
Social HealthBeing able to interact with others and participate in the community in both an independent and cooperative way.
Mental Health‘State of well-being in which the individual realises his or her own abilities, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community.’ (WHO, 2009)
Health Status: ‘An individual’s or a population’s overall level of health, taking into account various aspects such as life expectancy, amount of disability and levels of disease risk factors.’ (AIHW, 2008)
Mortality: Refers to the number of deaths caused by a particular disease, illness or environmental factor.
Morbidity: ‘Refers to ill health in an individual and the levels of ill health in a population or group.’
Incidence: The number or proportion of new cases of a particular disease in a population over a period of time.
Prevalence: ‘The number or proportion of cases of a particular disease or condition present in a population at a given time.’
Life Expectancy: ‘An indication of how long a person can expect live, it is the number of years of life remaining to a person at a particular age if death rates do not change.’
Under 5 Mortality Rate: ‘The number of deaths of children under five years of age per 1000 live births.’
Health Adjusted Life Expectancy (HALE) A measure of burden of disease based on life expectancy at birth, but including an adjustment for time spent in poor health. It is the number of years in full health that a person can expect to live, based on current rates of ill health and mortality.
Burden of Disease: A measure of the impact of diseases and injuries, specifically it measures the gap between current health status and an ideal situation where everyone lives to an old age free of disease and disability. Burden of disease is measured in a unit called the DALY.
Disability Adjusted Life Year (DALY): A measure of the burden of disease, where one DALY equals one year of healthy life lost due to premature death or time lived with illness, disease or injury.
Years of Life Lost (YLL): The fatal component of the Burden of Disease - indicating Premature Death
Years of Life lost due to Disability (YLD): The non-fatal component of the Burden of Disease - referring to healthy life lost to disability or illness
Memorise the above definitions and you'll never run the risk of losing marks from some pesky/picky assessor
