Let's look at a few useful things in last week's sample answer.
1) Phrases to begin main paragraphs
These phrases aid coherence by telling us what each paragraph is about:
- It is clear that... (overview)
- Looking first at the older age groups,...
- At the other end of the age scale,...
2) Paraphrasing of "attendances at hospital emergency care departments"
- visits made to hospital emergency wards
- visitors to A&E (accident and emergency) departments
- emergency care attendances
- attended A&E wards
- require emergency treatment
- figures for A&E visits
3) Language for comparisons
- the most frequent visitors
- less than half as likely to
- made the fewest visits
- almost no difference in the figures for
4) Language for describing changes
- there was a slight increase in
- and this rose to almost... one year later
- rose marginally from... to...
5) Giving the figures
- roughly 65 out of every 1000 people
- almost 70 attendances per 1000-population
- around 30 attendances per 1000-population
- from around 50 to approximately 52 per 1000-population
- just over 20 per 1000-population
6) Easy verbs, but 'big' noun phrases
If you look closely at the answer, you'll see that the verbs are easy (e.g. were, was, rose, attended, made). However, there are lots of big noun phrases (e.g. hospital emergency wards, emergency care attendances, those aged 65 to 74). This is quite typical in IELTS writing task 1 answers.