Note for international readers: Japan mandates annual school health checkups for all primary and secondary school students under the School Health and Safety Act (Article 13). Checkups are conducted each spring (April–June) and results are sent home to families. The results slip uses classification categories — typically "no findings," "observation," "specialist evaluation recommended," and "treatment needed" — but does not explain what to do next. This article provides that map.
Lead
At the end of May, a parent opens an envelope from school to find three notices: "Cardiac murmur detected — specialist evaluation recommended." "Protein in urine — observation." "Spinal abnormality — re-examination."
What is the difference between "specialist evaluation" and "observation"? Where do you go for each? How soon? These questions are not answered on the slip. The uncertainty is not a sign that the system failed; it is a feature of how screening works — and knowing how screening works makes the notices much easier to read.
Japan's School Health and Safety Act (Article 13) mandates these checkups each year [1]. The purpose is screening: not confirming a diagnosis, but identifying children who need a second look. Understanding that frame is the starting point.
Three Levels of School Health Checkup Results
School health checkup notifications generally carry one of three meanings:
- Specialist evaluation recommended (要精査): A specialist examination is advised. The notice often suggests a timeframe such as "this semester" or "before summer vacation"
- Observation (経過観察): Currently not a problem, but the finding warrants attention before the next checkup
- No findings (異常なし): No action needed at this time; file the result
"Observation" is not the same as "normal." It means "watchful waiting with intent to follow up" — not "ignore this until next year." If concerning symptoms develop, seeing a doctor is appropriate.
Reading the Results by Item
Cardiac Murmurs: Functional vs. Structural
It is not unusual for a school physician to hear a cardiac murmur on auscultation. The positive screening rate runs around 8–10%, but the large majority of those are "innocent" or functional murmurs — a category of sounds produced without any structural cardiac abnormality [2]. Functional murmurs commonly become inaudible as a child grows.
Structural murmurs — associated with valve disease or congenital heart defects: structural abnormalities of the heart present from birth, ranging from minor to surgically correctable — account for fewer than 1% of all flagged cases [2], but they do warrant investigation.
When a school health checkup flags a cardiac murmur, the standard next step is an echocardiogram: an ultrasound imaging test of the heart that shows its structure and blood flow without radiation exposure at a pediatrician or pediatric cardiologist. Being told "this is functional" is itself a significant outcome — the anxiety it resolves is real.
Urinary Protein: Orthostatic or Glomerular?
When protein is found in a urine sample, the first question is whether this is orthostatic (postural) proteinuria.
Orthostatic proteinuria is protein that appears in the urine while standing but disappears when lying down. Approximately 60–70% of children with a positive school urine test have this benign, functionally normal variant [3]. The test to distinguish it is straightforward: compare a first-morning urine sample (collected immediately on waking, before standing) with a mid-afternoon sample, using the urinary protein-to-creatinine ratio.
If the proteinuria is not orthostatic, then glomerular causes — IgA nephropathy, nephrotic syndrome, and others — need to be ruled out, and a referral to a pediatric nephrologist is indicated [4].
Spinal Curvature: The Cobb Angle and When It Matters
School health screening for scoliosis: an abnormal lateral and rotational curvature of the spine, most commonly idiopathic (no known cause) and detected during the adolescent growth spurt (typically in grades 5–6 in Japan) uses visual inspection or the Adams forward bend test. A follow-up notice at this stage means the next step is X-ray measurement of the Cobb angle: the standard X-ray measurement of spinal curvature in scoliosis, measured in degrees from the most tilted vertebrae above and below the curve.
AIS: Adolescent Idiopathic Scoliosis: lateral spinal curvature of 10° or more with no identified cause, occurring during adolescent growth, affecting girls 7–10 times more often than boys (Adolescent idiopathic scoliosis) is diagnosed at a Cobb angle of 10 degrees or more and is seven to ten times more common in girls [5]. Treatment thresholds follow a gradient [6]:
- Cobb angle below 25°: periodic X-ray monitoring
- Cobb angle 25°–45°: bracing may be considered. The BRAIST trial reported that bracing was associated with a 72% rate of success in avoiding surgery [6]
- Cobb angle above 45°: surgical consultation becomes relevant
At the "suspected scoliosis" stage of a school checkup, most children have Cobb angles in the mild range of 10–20°. The first concrete step — seeing an orthopedic specialist or spinal specialist to obtain a Cobb angle measurement — provides the information needed to determine any further plan.
Color Vision: How Screening Changed in 2003
Since 2003, color vision testing has been optional rather than mandatory in Japanese school health checkups. The change reflected concern that identifying children with color vision variation was leading to unnecessary labeling [1].
At present, testing can be requested. Congenital color vision deficiency is X-linked recessive and affects approximately 5% of males and 0.2% of females [7]. Its impact on daily life depends considerably on occupation and context. Knowing earlier provides the opportunity to factor it into future decisions without being taken by surprise.
Dental Findings: CO and GO
Two common notations on dental checkup results are "CO" and "GO."
- CO (Caries Observation): An early-stage cavity under observation. Fluoride application and regular monitoring can prevent progression
- GO (Gingival Observation): Early gum inflammation. Improved brushing technique typically resolves it
Neither indicates immediate treatment — both call for regular preventive dental visits and observation. Folding these into a routine dental appointment schedule is the practical response.
Keeping a Longitudinal Record
Schools retain health checkup forms for five years under the legal requirement, but that record is held by the school, not the family. For parents to track change over time, they need their own system.
Organizing each year's results by year, item, finding, and the outcome of any specialist visit produces a multi-year record. Vision change, height-weight trajectory, recurring proteinuria — these are patterns that a single checkup result cannot reveal but that become legible when several years are viewed together.
The value of having kept these records tends to be felt most acutely after something happens. Keeping the habit before that moment arrives is the point.
Summary
A school health checkup notice is not a diagnosis. It is an invitation to take the next step. "Specialist evaluation recommended" is not a notification that something serious has been found — it is a referral to someone better equipped to determine whether something is there.
The appropriate action and the relevant timeframe differ by item. Reading the notice with that framework in mind, then identifying the right specialist for the specific finding, is how the screening system is designed to function — and how it works when the family completes the loop.
References
- Ministry of Education, Culture, Sports, Science and Technology (Japan). Implementing Regulations of the School Health and Safety Act. Revised 1997. Available from: https://www.mext.go.jp
- American Academy of Pediatrics, Section on Cardiology and Cardiac Surgery. Innocent murmurs. Pediatr Rev. 2011;32(12):e105–e108. doi:10.1542/pir.32-12-e105. PMID: 22135426.
- Springberg PD, Garrett LE Jr, Thompson AL Jr, Collins NF, Lordon RE, Robinson RR. Fixed and reproducible orthostatic proteinuria: results of a 20-year follow-up study. Ann Intern Med. 1982;97(4):516–519. doi:10.7326/0003-4819-97-4-516. PMID: 7114631.
- Japanese Society for Pediatric Nephrology. School Urinalysis Manual. 2022. Available from: https://www.jspn.jp
- Weinstein SL, Dolan LA, Cheng JC, Danielsson A, Morcuende JA. Adolescent idiopathic scoliosis. Lancet. 2008;371(9623):1527–1537. doi:10.1016/S0140-6736(08)60658-3. PMID: 18456103.
- Weinstein SL, Dolan LA, Wright JG, Dobbs MB. Effects of bracing in adolescents with idiopathic scoliosis. N Engl J Med. 2013;369(16):1512–1521. doi:10.1056/NEJMoa1307337. PMID: 24047455.
- Birch J. Worldwide prevalence of red-green color deficiency. J Opt Soc Am A Opt Image Sci Vis. 2012;29(3):313–320. doi:10.1364/JOSAA.29.000313. PMID: 22472762.
- Ministry of Health, Labour and Welfare (Japan). Direction of Tuberculosis Screening After IGRA Introduction. 2017.