The phrase "a subsample of an" is correct and usable in written English.
It can be used when referring to a smaller portion taken from a larger sample for analysis or study purposes.
Example: "In our research, we analyzed a subsample of an extensive dataset to draw more specific conclusions."
Alternatives: "a subset of" or "a portion of".
We have observed a correlation between shorter telomere length at adult age and the reported number of childhood adverse life events in a subsample of an epidemiological cohort consisting of anxiety disorder patients and matched controls.
One hundred ninety-seven participants including 54 females with age 32.02±10.73 and 143 males with age 32.22±9.70 were investigated in this study, which is a subsample of an on-going study designed to investigate genetic prediction for substance dependence.
One hundred ninety-six participants including 53 females with age 32.21± 10.74 and 143 males with age 32.22± 9.70 were investigated in this study, which is a subsample of an on-going study designed to investigate genetic/epigenetic prediction for substance dependence.
In a subsample of an earlier MoBa version (2934 singleton pregnancies), Nilsen et al. did not find any significant associations of dietary folate intake, folic acid supplementation or plasma folate with PTD.
Molecular taxonomy of a subsample of An. minimus s.l.l
A subsample of An. gambiae s.l. was further analyzed for species identification, and the results indicated that 99.3% were Anopheles arabiensis, while 0.7% were An.
Using data from a subsample of a national survey that included information from telephone interviews and surveys 10 years apart, the researchers identified 22 individuals who had been widowed within three years of the follow-up interview and had not remarried.
It used a cross-sectional study design with a quota sample of 1075 low-income men aged 17 45 years, and a subsample of a high-risk population of 330 male long-haul truck drivers aged 14 62.
13 This study used a subsample of a larger study carried out among UK service personnel (n=5743), in which 4% of the men fitted the criteria for PTSD.
This study uses a subsample of a larger SAWEs Study (Ronkainen et al., 2009; Pöllänen et al., 2011) including postmenopausal HRT discordant MZ twin pairs and a cohort of premenopausal women with no hormonal treatment.
The data were collected via a routine screening programme and represent a subsample of a previous, large sample study reporting levels of anxiety and depression of a mixed patient cohort (Vodermaier et al, 2010).
