NAC might help reduce OCD symptoms more than placebo after 10 weeks, but the difference wasn't quite big enough to be considered statistically significant.
Scientific Claim
N-acetylcysteine (NAC) added to citalopram shows a trend toward improving overall OCD symptom severity at week 10, with a mean difference of 8.4 points between groups (P=0.06), though this did not reach statistical significance.
Original Statement
“The mean difference was not statistically different between the two groups at weeks 4 and 8 (P = 0.3, and P = 0.1, respectively). However, there was a trend for statistically significant difference between the two groups in the mean difference of YBOCS at week 10 (P = 0.06).”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
probability
Can suggest probability/likelihood
Assessment Explanation
The study design supports causal inference, but the small sample size and high dropout rate limit precision. The study states 'trend for statistically significant difference' which is appropriate for this finding.
Evidence from Studies
Supporting (1)
Some psychometric properties of the Pediatric Quality of Life Inventory™ Version 4.0 Generic Core Scales (PedsQLTM) in the general Serbian population