Effectiveness of a Tailored Lifestyle Management Program for Middle-Aged Women With Coronary Artery Disease: A Preliminary Study.
Ching-Ching Tsai, Ai-Hsien Li, Chung-Ming Tu and 2 others
PMID 29985820WHAT IT FOUND
A 12-week home-based lifestyle program significantly improved cholesterol and waist size in middle-aged women with heart disease.
However, it failed to reduce blood pressure, blood sugar, or inflammation markers. The small sample size limits how much weight to give these results.
Key findings
01The intervention group showed significant increases in HDL cholesterol and decreases in total cholesterol and waist circumference compared to the control group.
02There were no significant improvements in biological indicators of inflammation or metabolic control, such as high-sensitivity C-reactive protein or blood pressure.
03The study was underpowered for many outcomes, with a final sample of only 35 participants despite a calculated need for 48.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The sample size was small (n=35), falling short of the calculated requirement of 48 participants, which reduces statistical power and generalizability. The study population was restricted to middle-aged women in northern Taiwan, limiting applicability to other demographics or regions. Compliance with the lifestyle program was not objectively monitored, which may have led to an overestimation of the intervention's effect. Baseline values for blood pressure and glucose were not high, potentially creating a floor effect that masked improvements in these areas. Both groups received some form of telephone contact, which may have diluted the difference between the intervention and control conditions.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not assume this program effectively controls blood pressure or inflammation. The study failed to show significant improvements in these key cardiovascular risk factors, and the positive results for cholesterol and waist size come from a very small, underpowered sample.