Health Anxiety Inventory – Hypochondria

Abstract

The Health Anxiety Inventory (HAI) is a critical psychological assessment tool introduced in 2002 by Salkovskis, Rimes, Warwick, and Clark. It was specifically designed to provide a comprehensive and quantifiable measure of Health Anxiety and its more severe, persistent form, Hypochondriasis. The inventory successfully captures not only the core symptoms of health preoccupation but also the crucial associated cognitive and behavioral factors that maintain the disorder.

The HAI features multiple modalities distinguished primarily by their time referent. The “week” version is highly sensitive to recent changes, making it ideal for tracking short-term treatment outcomes. Conversely, the “month” version utilizes a six-month recall period, aligning with the historical diagnostic duration criteria for Hypochondriasis as outlined in the DSM-IV. Furthermore, the scale is available in both short forms for standard clinical application and longer versions for detailed research requiring extensive subscale analysis.

Keywords

Health Anxiety, Hypochondriasis, Illness Anxiety Disorder, Salkovskis, Psychological Assessment, Measurement, Reassurance Seeking, Avoidance, Catastrophic Thinking, Validation, Psychological Medicine

Authors

Salkovskis, P.M., Rimes, K.A., Warwick, H.M.C., Clark, D.M.

Purpose

The central purpose of the Health Anxiety Inventory is to establish a standardized and robust metric for quantifying the severity of health-related distress, excessive worry, and preoccupation. This scale is considered foundational within cognitive-behavioral research and clinical practice concerning the etiology and effective treatment of Health Anxiety.

Functionally, the HAI serves two distinct roles based on the administration period. The “month” versions are typically used as screening instruments to determine if an individual meets the chronic duration criteria necessary for a formal diagnosis (e.g., the historical six-month requirement for Hypochondriasis). In contrast, the “week” versions are indispensable as treatment outcome measures, offering high sensitivity to symptomatic and behavioral changes following therapeutic intervention.

Construct

The HAI is meticulously structured to capture the multi-faceted cognitive and behavioral components underlying Health Anxiety. It operationalizes the construct through four primary domains, ensuring a comprehensive assessment:

• Main Section: Quantifies the core symptomatic experience and the level of preoccupation characteristic of health anxiety or hypochondriasis.

• Awfulness/Attitudes: Assesses the individual’s catastrophic beliefs concerning the potential consequences of developing a serious illness. This section is often analyzed separately and serves effectively as a treatment process measure.

• Avoidance: Measures the extent of behaviors employed by the individual to steer clear of illness-related information, medical settings, or other triggers.

• Reassurance Seeking: Measures the frequency and intensity of attempts to seek validation or comfort from medical professionals, family, or friends regarding their current health status.

Validity

The formal validation of the Health Anxiety Inventory was published in 2002. The scale demonstrates robust psychometric properties, particularly strong criterion validity. This is exemplified by the “month” version, which was deliberately engineered to require a six-month recall period, thereby matching the duration criteria established by the DSM-IV for the diagnosis of Hypochondriasis.

By segmenting the measure into distinct areas—including core symptoms, cognitive attitudes (awfulness), and maladaptive behaviors (avoidance and reassurance seeking)—the HAI effectively captures the complexity of the disorder. This multi-faceted structure supports the scale’s theoretical foundation, reflecting established psychological models regarding the maintenance of excessive health worry.

Reliability

The HAI exhibits high reliability, which is consistently supported by its widespread use in rigorous clinical and academic research. The instrument demonstrates strong internal consistency across its various subscales, confirming that the items within each domain measure a unified underlying construct.

A key aspect of the HAI’s reliability lies in its “week” version. This version is specifically recognized for its high sensitivity and reliability as a measure of change over short periods. This characteristic is vital for accurately tracking therapeutic progress and symptom fluctuations during Cognitive Behavioral Therapy (CBT) interventions, thereby confirming its utility as a reliable treatment outcome measure.

Factor Analysis

Although the precise details of the factor structure are typically detailed within the original validation paper and subsequent psychometric studies, the design of the HAI inherently suggests a multi-factor structure. This structure corresponds directly to the four primary domains it assesses: core symptoms, catastrophic cognitions, avoidance behaviors, and reassurance seeking.

The existence of a Long Version of the HAI is predicated on the ability to reliably extract these distinct factors or subscales from the full item set. This longer instrument is reserved for research contexts where a granular understanding of the contribution of each psychological component is necessary.

Instrument

Test Type: Self-report questionnaire

Format: Available in Short (e.g., the first 14 main questions) and Long versions. Each version is available with a “Week” or “Month” time reference. The main section is typically scored on a 0–3 basis, while other sections (Awfulness, Reassurance, Avoidance) are totaled separately.

Language Available: English (Original)

Population Group: Clinical and non-clinical adults reporting symptoms of excessive health worry or Health Anxiety.

Age Group: Adults

Population Details: Primarily used to assess populations presenting with somatic symptoms, illness worry, or those undergoing CBT treatment for health anxiety.

Test Methodology: The “month” version employs a six-month recall period, consistent with the historical time requirement for DSM-IV hypochondriasis diagnosis. Response frequency is rated on a 0–4 or 0–3 scale, depending on the specific section being completed.

Keywords

Salkovskis, Measurement, Treatment Outcome, Catastrophic Cognition, Illness Worry, Reassurance Seeking, Avoidance Behavior, Psychological Medicine, Validation

Authors

Author ORCID Identifier: Not specified in source content.

Affiliation Email addresses: Not specified in source content.

Correspondence Address: Not specified in source content (Affiliated with King’s College London, Institute of Psychiatry, Psychology & Neuroscience).

Permissions & Fee and Test Year

The Health Anxiety Inventory was first published and formally validated in 2002. The instrument is generally made available by the authors for clinical practice and academic research purposes.

The original PDF versions of the scale, maintained by the authors’ former institution (King’s College London, KCL), are provided below for reference:

• HAI Short Week (PDF 580 kb): HAI Short Week
• HAI Long Week (PDF 1.53 mb): HAI Long Week
• HAI Short Month (PDF 577 kb): HAI Short Month
• HAI Long Month (PDF 1.53 mb): HAI Long Month

Reference’s

Salkovskis, P.M., Rimes, K.A., Warwick, H.M.C. & Clark, D.M (2002) The Health Anxiety Inventory: development and validation of scales for the measurement of health anxiety and hypochondriasis. Psychological Medicine, Vol. 32, 843-853.

Additional related questionnaires referenced by the authors’ institution:

• Beliefs Questionnaire (PDF 45 kb): Beliefs Questionnaire
• RCQ (PDF 276 kb): RCQ
• Illness Attitudes Questionnaire (PDF 158 kb): Illness Attitudes Questionnaire

Items of the Health Anxiety Inventory – Hypochondria

Name ………………………………………………. .

Date …………………… .

This questionnaire has two parts‚ each divided in to two sections:

The first part of the questionnaire contains some ideas that may go through your mind when you have symptoms about which you think you may need to see a doctor. In the first section you are asked to rate how often you have the ideas stated; and in the second section you are asked to rate how much you believe these ideas when you have them.

Please rate the frequency and belief of these ideas during the time from when you first thought that perhaps you might need to see the doctor to when you actually went. The ideas may occur in any form‚ for example as a word‚ mental image or a sudden urge to carry out some action.

The second part of the questionnaire contains some ideas that may go through your mind when you have thoughts of yourself developing a serious illness. Again‚ in the first section you are asked to rate how often you have the ideas stated; and in the second section you are asked to rate how much you believe these ideas when you have them.

How much you believe an idea does not depend on how often you have the idea. You may have a thought that occurs frequently that you do not believe; or you may have a thought that occurs occasionally that you strongly believe.

SECTION 1

1.A FREQUENCY

When you have symptoms about which you think you may need to see a doctor‚ how often do you have the following ideas? (You will later be asked to rate how much you believe these ideas so in this section please only rate how often you have the ideas.) Circle the number that most accurately describes the frequency of the occurrence of the ideas using the following scale:

o = Idea never occurs

1= Idea rarely occurs

2= Idea occurs about half the time that I think about these symptoms

3= Idea usually occurs

4= Idea always occurs

I.B BELIEF

When you have symptoms about which you think that you may need to see a doctor‚ how much do you believe each of these ideas to be true?

I do not believe this idea at all =0‚ 10‚ 20‚ 30‚ 40‚ 50‚ 60‚ 70‚ 80‚ 90‚ 100=I am completely convinced that this Idea is true

I must tell the doctor exactly how I feel.

If I am not aware of all my symptoms‚ I may be seriously ill without knowing it.

If I am not fully aware of my symptoms and the doctor tells me I am well when I am not‚ then it is my fault.

I must go to the doctor just in case I am seriously ill.

If I don’t keep a close watch on my symptoms all the time‚ then I may miss an important one.

If I fail to explain every symptom in detail‚ then it would be my fault if I developed a serious illness to a stage too late for treatment.

It would be wrong not to mention every symptom‚ even the most minor symptoms in case they are important.

The doctor may fail to realize that 1 am seriously ill if I miss. Out any details about my symptoms.

I’ll only worry if I haven’t told my doctor exactly what my symptoms are and how I feel.

I need to be sure that I get the right diagnosis.

If I don’t go to the doctor about these symptoms‚ then it would be my fault if it got too late to do anything about a serious illness.

It is best to know if I am seriously ill as it may be possible to do something about it before it’s too late.

I shouldn’t go to the doctor as it would be better not to know if 1 am seriously ill.

If I don’t pay attention to my symptoms I may not be able to tell the doctor everything he/she needs to know.

I need to be certain that these symptoms don’t mean that I am seriously ill.

It is enough just to tell the doctor the symptoms I happen to have noticed.

It is the responsibility of the doctor to ask anything extra he/she needs to know.

I need only tell the doctor the most obvious symptoms.

There’s no point in focussing on the symptoms all the time symptoms as I am aware of the most important ones anyway.

The doctor will ask whatever extra he/she needs to know to give me the correct diagnosis.

I will wait and see if I continue to have these symptoms before deciding to go to the doctor.

These symptoms probably don’t mean anything so I don’t 0 10 20 30 40 SO 60 70 80 90 100 need to go to the doctor.

SECTION Two

l.A FREQUENCY

Below are several ideas that may go through your head when you bave thoughts of yourself developing a serious illness. Think of the last time that you had these thoughts; use the scale below to rate how often you had these ideas when you had thoughts of yourself developing a serious illness.

o = Idea never occurs

1= Idea rarely occurs

2= Idea occurs about half the time that I think about these symptoms

3= Idea usually occurs

4= Idea always occurs

2.B BELIEF

Think of the last time that you had thoughts of yourself developing a serious illness; use the scale below to rate how much you believed these ideas when you had thoughts of a serious illness.

I do not believe this idea at all =0‚ 10‚ 20‚ 30‚ 40‚ 50‚ 60‚ 70‚ 80‚ 90‚ 100=I am completely convinced that this Idea is true

It’s wrong to ignore these thoughts of a serious illness.

Thinking about this illness could make me get it.

I f I am too confident about my health then it is tempting fate and I may get ill.

If I don’t worry about my health I could get sick.

Worrying about one’s health doesn’t do any good.

ha‎ving these thoughts about myself developing a serious illness is an indication that I really might get seriously ill.

This is just a thought so I don’t need to worry about it.

There must be a reason for ha‎ving these thoughts of a serious illness.

Just ha‎ving this thought will not make me get the illness.

Since 1 have thought that I might be developing this illness I must make every effort to do something about it.

ha‎ving these thoughts doesn’t mean that I will get seriously ill.