The phrase 'had a modest effect' is correct and usable in written English.
It can be used when you want to express that something had a minimal or limited effect. For example: "The increase in taxes had a modest effect on people's ability to purchase luxury items."
Our results demonstrated that tamoxifen on its own was not effective at suppressing ER-negative tumour growth, whereas EGCG had a modest effect on tumour growth, but the combination of the two drugs showed marked tumour suppression.
Strategies to promote nutritional intake have had a modest effect on protein-calorie intake.
In contrast, strengthening the interaction between the RPR and the 3′ end of the substrate only had a modest effect.
Conclusions: While the bedspace posters had a modest effect, we are now enforcing the guidelines through the weekly medical and nursing teaching sessions, and also ensuring all requests for clinical reasons are agreed with the registrar or nurse in charge.
LEV had a modest effect on reducing CSD susceptibility at a dose of 400mg/kg/d, and the effects on CSD susceptibility were comparable when administered acutely or chronically.
While the study had a strong placebo effect, she said she still thought the herbal supplement had a "modest effect on hot flashes".
Also, the haplotype GAAC had a modest effect on urine albumin-to-creatinine ratio in normotensive subjects (p = 0.0482).
The presence of 3 mM GdnHCl had a modest effect on cell reproduction, with cells reproducing more slowly in the presence of GdnHCl.
Although treatment with Compound A or doxorubicin individually had a modest effect on cell growth early, it appeared only to delay cell growth (Figure 3A).
While the hASF1a S192A mutation had a modest effect on hASF1a stability, the phosphorylation mimicking S192D mutation showed significantly higher protein levels (Figure 3C, D).
PGA1 had a modest effect on cellular Akt phosphorylation (Figure 3C, lane 5), which corresponds with its weaker covalent modification of cellular PTEN (Figure 2C, lane 3).
