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J Marr

Publications and source records attributed to J Marr.

At least 37 records · Page 2Linked to original sources
PubMed1990

Cervical orthoses: the issue of patient compliance.

A convenience sample of 22 subjects was used to investigate patient compliance between two types of cervical collars, the Stifneck and the Orthotech. There was no significant difference with respect to compliance between the two groups of collar users. Based on these findings, the investigators made recommendations for collar use in their institution.

Activities of Daily Living↗
PubMed1990

Assessment of gonadal maturation by evaluation of spermaturia.

The urinary excretion of spermatozoa (spermaturia) reflects the achievement of exocrine testis function during male puberty. In order to test the sensitivity and practicability of repetitive urine sampling, we analysed the sediments of 1160 first morning urine specimens obtained on successive days from 129 healthy schoolboys aged 10.1 to 17.8 years for the presence of spermatozoa. The proportion of subjects with sperm positive urines increased from pubic hair stage (PH) 1 (6%) to PH 5 (92%) with a steep rise between PH 2 and 3. Estimated median age of first positive spermaturia ('spermarche') was 14.1 years. While at PH 1 to 4 all positive samples were found within the first five days of collection, at PH 5 cumulative frequency of spermaturia increased up to day 8. We conclude that repetitive morning urine sampling is a useful tool in assessing spermaturia and may be helpful to screen for testicular damage in epidemiological surveys.

Adolescent↗