Self-Report Questionnaire for diagnosis of Acute Mountain Sickness (AMS)

Lake Louise Score (LLS)

For the diagnosis of Acute Mountain Sickness (AMS)

A diagnosis of AMS is based on:

  1. A rise in altitude within the last 4 days
  2. Presence of a headache

Plus

  1. Presence of at least one other symptom\
  2. A total score of 3 or more from the questions below

SELF-REPORT QUESTIONNAIRE

Add together the individual scores for each symptom to get the total score.

Headache

No headache

0

 

Mild headache

1

 

Moderate headache

2

 

Severe headache

3

 

 

   

 

Gastrointestinal Symptoms

None

0

 

Poor appetite or nausea

1

 

Moderate nausea &/or vomiting

2

 

Severe nausea &/or vomiting

3

 

 

   

 

Fatigue &/or weakness

Not tired  weak

0

 

Mild fatigue/weakness

1

 

Moderate fatigue/weakness

2

 

Severe fatigue/weakness

3

 

 

   

 

Difficulty sleeping

Slept as well as usual

0

 

Did not sleep as well as usual

1

 

Woke many times, poor sleep

2

 

could not sleep at all

3

 

 

Total Score

 

 

Total score of:

  • 3 to 5 = Mild AMS
  • 6 or more = severe AMS

Note:

  • Do not ascend with symptoms of AMS
  • Descend if symptoms are not improving or getting worse
  • Descend if symptoms of HACE or HAPE develop
  • HACE refers 'High Altitude Cerebral Edema'
  • HAPE refers 'High Altitude Pulmonary Edema'

 

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