Low back epidemiology

Question 1

prevelence vs incidence

Answer 1

prev- total number of cases of a specific disease @ cetain point in time

Inc- number of new cases during a spec time period

Question 2

what % of pop will surfer with lbp and % of current that does

Answer 2

84%

4-25% at any given time

Question 3

LBP is most common in what age bracket

Answer 3

30s-late 50s

under 45 it is #1 health complaint

Question 4

how much of the working pop will be affected by LBP

Answer 4

more than 50% at some point in there career

-Longer you are off work, the less likely you are to return to full employment (emotional distubance plays massive role in this)

Question 5

What are risk factors for developing occupational LBP (3)

Answer 5

1. a hx of LB injuries
2. Taking time off work
3. having to perform light duties

Question 6

3 stages of back pain and timeframes

Answer 6

Acute- 0-6w
Subacute- 6-12w
Chronic- >16w

Question 7

what % of ppl will get better on your own for LBP

Answer 7

85%

Question 8

Having a sibling w chronic LBP increases the likelihood of LBP by

Answer 8

20%

50% if identical

Question 9

3 phases of LBP

Answer 9

1. Dysfuction (mechanical)
2. Instability
3. Stabilization (joints become less stable)

Question 10

Pain sensitive structures of the LB

Answer 10

• periosteum
• outer layer of anulus fibrosis
• Ant longitudinal lig
• post elements
• muscles
• capsul of j

Question 11

Unusual nerve growth of chronic LBP (1)

Answer 11

1. nerve growth into the inner third of annulus fibrosis

2. nerve growth to nucleus pulposus

Question 12

why is maintaining lumbar lordosis a good thing in a lift

Answer 12

loss of lumbar lordosis puts strain on posterior ligamentus system

Question 13

if away for 6m, 1year or 2 years % of going back to work

Answer 13

6- 50%
1- 25%
2- no chance