six months interval

USAGE SUMMARY

The phrase "six months interval" is not correct in standard written English.
The correct expression would be "six-month interval," using a hyphen to connect the words. Example: "The study was conducted over a six-month interval to assess the long-term effects of the treatment."

⚠ May contain grammatical issues

Science

Academia

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

6 human-written examples

And, of course, it only applies at every six months interval.

Yale University

It may also be explained by the fact that for women with normal cytology, the guidelines recommend biopsy only when a persistent infection is demonstrated (HPV positive with six months interval) and consequently the risk of having a CIN2+ is higher.

Plosone

We considered changes in the four outcomes at six months interval.

BMC Infectious Diseases

When requiring six months interval between the two visits, the overall PPV increased to 52%, whereas the sensitivity decreased to 73%.

Clinical Epidemiology

The average weight of the children at the second measurement after a six months interval was 21.44 (SD 1.50) kg and analogically calculated daily intake was 0.378 (SD 0.084) mg of fluoride per child.

BMC Public Health

The paper based questionnaire takes a wide range of variables into consideration and is therefore given to participants at six months interval too lower burden and thus minimize loss to follow-up.

BMC Public Health

Human-verified similar examples from authoritative sources

Similar Expressions

54 human-written examples

In the trial by Lygidakis et al. [ 10] patient follow-up was performed every three months for the first year, at four months intervals during the second year and at six months intervals during the following years.

BMC Cancer

Up to 36 months after surgery, women will be contacted to assess their fertility status at six months intervals starting form the day of the operation.

BMC Women's Health

Although there was a decrease in the intensity of dimensions, not correlated to the overall reduction of the severity of the disorder, shifts from one dimension to another were rare at six months intervals up to two years post-initial assessment.

BMC Psychiatry

Allowing both random and fixed effects of medication along the study period, multilevel mixed-effects linear regression was used to estimate mean differences and 95% confidence intervals (CIs) at three different time points by six months intervals (June 2009, December 2009 and June 2010) after adjusting for sex, age and diabetes.

BMC Nephrology

Urinary β2m levels of spot urine samples were analyzed using the Enzyme-linked Immunosorbent assay (ELISA) and dietary patterns were studied using twenty four hour dietary recalls and frequency consumption of foods of animal origin performed on three occasions at six months intervals within a period of one and half years.

BMC Nephrology

Expert writing Tips

Best practice

When describing research or medical follow-ups, specify "six-month intervals" for clarity and precision. For example, patients were reviewed at "six-month intervals".

Common error

The most common error is omitting the hyphen in "six-month interval". Without the hyphen, "six" incorrectly modifies "months" instead of "interval". Always include the hyphen to clarify that "six-month" functions as a single adjective.

Linguistic Context

The phrase "six months interval" functions as a noun phrase, intended to specify a duration. However, as Ludwig AI points out, it's grammatically incorrect without the hyphen.

Expression frequency: Uncommon

Frequent in

Science

57%

Academia

14%

Formal & Business

14%

Less common in

News & Media

7%

Wiki

7%

Science

0%

Ludwig's WRAP-UP

In summary, while "six months interval" is understandable, it's grammatically incorrect. As Ludwig AI explains, the correct form is "six-month interval", using a hyphen to create a compound adjective. Usage varies across contexts, but it’s most common in scientific and academic writing. To avoid errors, remember to include the hyphen for grammatical accuracy. Alternative phrases, such as "period of six months", can also be used for clarity.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

six-month interval

Uses a hyphen to correctly form a compound adjective modifying 'interval'.

period of six months

Rephrases to emphasize the duration using 'period'.

six month period

Similar to the query, but removes 'of' to make it more common.

duration of six months

Emphasizes the length of time involved.

six-month timeframe

Substitutes 'interval' with 'timeframe', still using the correct hyphenation.

six months span

Uses 'span' to denote a continuous period of time.

interval of six months

Rearranges the phrase to a more grammatically sound structure.

over six months

Simple prepositional phrase denoting a duration.

a semester

If applicable, uses semester, which often represents six months.

half a year

Expresses the duration in terms of a fraction of a year.

FAQs

How to correctly write about a period of six months?

The correct way is to use the term "six-month period", which includes a hyphen to join "six" and "month" into a single adjective describing the period.

What's the difference between "six months interval" and "six-month interval"?

The phrase "six months interval" is grammatically incorrect. The correct phrase is "six-month interval", where the hyphen creates a compound adjective modifying "interval".

What are some alternatives to "six months interval"?

Alternatives include "period of six months", "six-month timeframe", or simply "semester" if the context is academic.

Is "six months interval" ever correct?

No, "six months interval" is not considered grammatically correct in standard written English. The adjectival form "six-month interval" is the accepted form.