Autobiographical memory and hierarchical search strategies in depressed and non-depressed participants.

BACKGROUND: There is a growing body of literature showing individuals with depression and other trauma-related disorders (e.g., posttraumatic stress disorder) recall more overgeneral and less specific autobiographical memories compared to normal participants. Although the mechanisms underlying overgeneral memory are quite clear, the search strategy operated within the autobiographical knowledge base, at time of recollection, requires further exploration. The current study aimed to examine the hierarchical search sequence used to recall autobiographical memories in depressed and non-depressed participants, with a view to determining whether depressed participants exhibited truncated search strategies. METHODS: Thirteen depressed and an equal number of non-depressed participants retrieved 15 memories each, in response to 15 commonly used cue words. Participants reported the first memory that entered in their mind. All memory descriptions were recorded and later transcribed verbatim for content analysis. RESULTS: Depressed participants retrieved autobiographical memories faster, produced shorter memory descriptions and were less likely to recall positive memories than non-depressed participants. Non-depressed participants were more likely to commence retrieval by accessing lifetime period knowledge followed by general event and event specific knowledge, whereas depressed participants showed a tendency to terminate retrieval at the general event level. CONCLUSIONS: It is concluded that depressed participants do adhere to the same hierarchical search strategy as non-depressed participants when retrieving specific autobiographical memories, but that they terminate their search early, resulting in overgeneral memories.

Current status of coronary risk factors among rural Malays in Malaysia.

BACKGROUND: Coronary heart disease (CHD) is the leading cause of death in Malaysia, despite its status as a developing country. The rural population is thought to be at low risk. OBJECTIVE: To investigate the prevalence of risk factors and global risk profile among rural Malays in Malaysia. METHODS: We studied 609 rural Malay subjects (346 females, 263 males; age range 30-65 years). Blood pressure (BP), body mass index (BMI), waist-hip ratio (WHR), smoking habits and family history of premature CHD were documented. Fasting blood samples were analysed for serum lipids, lipoprotein (a), plasma glucose and fibrinogen. Oral glucose tolerance tests were performed using 75 g anhydrous glucose. RESULTS: The prevalence of hypercholesterolaemia for total cholesterol concentrations of > or = 5.2, > or =6.5 and > or =7.8 mmol/l were 67.3, 30.5 and 11.8% respectively. There was a high prevalence of low serum high-density lipoprotein cholesterol (13.1%), hypertension (30.3%), smokers (24.4%), diabetes (6.4%), impaired fasting glucose or glucose tolerance (13.9%), overweight or obesity (44.7%) and increased WHR (48.5%). Global risk assessment showed that 67.3% of the study population were at risk, with 15.9, 18.9 and 32.5% in the mild, moderate and high risk categories respectively. CONCLUSION: Prevalence of risk factors was high in the rural population. Global risk assessment showed a high-risk profile with two-thirds being at risk, and one-third being categorized into the high-risk group. Although rural communities were considered at low risk of developing CHD, this is changing fast, possibly due to the rapid socio-economic development, in addition to underlying genetic predisposition.