[en] Background. Neck pain (DC) is one of the leading causes of disability both globally and nationally. Furthermore, forward head posture (FHP) has been identified as the most common postural attitude in the sagittal plane of the cervical spine, with controversy in the literature regarding its relationship with neck pain. Objetive. The main objective of this research is to check if there are significant differences in the presence of FHP through the measurement of the craniovertebral angle (CVA) between subjects with nonspecific chronic neck pain (ScDCC), and subjects without neck pain (SsDCC). As a secondary objective, to measure the intra and interobserver realibility of the measurement of that angle between two novice physiotherapists. Methods. This is an observational, cross-sectional study with a comparative design between two subgroups, ScDCC and SsDCC, in which CVA was measured in sitting and standing position through photogrammetry. In addition, sociodemographic and anthropometric variables, prevalence of musculoskeletal pain (DME), pain intensity, general health status, level of physical activity, risk of DC progression, and degree of cervical disability were analyzed. Outcomes There is a decrease in CVA in ScDCC compared to SsDCC, with a statistically significant decrease in CVA measurement in standing position (p=0.02) but not in sitting position (p=0,27). Interobserver reliability (ICC=0.98) and intraobserver reliability in sitting position (ICC=0.92 novel 1, ICC=0.93 novel 2) and in standing (ICC=0.90 novel 1, ICC=0.92 novel 2) are almost perfect. Conclusions. It has been noted that there is a relationship between the DC and the FHP measured through the CVA, significant for the standing position, but not for the sitting position. The inter and intraobserver reliability in novice evaluators of CVA measurement, both sitting and standing, is excellent, demonstrating that this photogrammetric test is a good option for evaluating subjects with FHP by novice evaluators.

[gl] Introdución. A dor cervical (DC) é unha das principais causas de discapacidade tanto a nivel mundial como a nivel nacional. Asimesmo, identificouse a postura de cabeza adiantada (FHP) como a actitude postural máis frecuente no plano saxital da raquis cervical, habendo controversia na literatura sobre a relación de esta coa dor cervical. Obxectivo. O obxetivo principal desta investigación é comprobar se existen diferenzas significativas na presenza da FHP a través da medición do ángulo craneovertebral (CVA) entre suxeitos con dor cervical crónica inespecífica (ScDCC), e suxeitos sen dor cervical (SsDCC). Como obxectivo secundario, medir a fiabilidade intra e interobservador da medición de dito ángulo entre dous fisioterapeutas noveles. Material e método. Estudo observacional, transversal, cun deseño de tipo comparativo entre dous subgrupos, ScDCC e SsDCC, nos cales se mediu o CVA na posición bípeda e sedente a través de fotogrametría. Ademáis, analizáronse variables sociodemográficas, antropométricas, prevalencia da dor musculoesquelética (DME), intensidade da dor, estado de saúde xeral, nivel de actividade física, risco de progresión da DC e grao de discapacidade cervical. Resultados. Existe unha disminución do CVA en ScDCC comparado a SsDCC, cunha disminución estadísticamente significativa na medición do CVA en postura bípeda (p=0,02) pero non na postura sedente (p=0,27). A fiabilidade interobservador (ICC= 0,98) e intraobservador en sedestación (ICC=0,92 novel 1, ICC= 0,93 novel 2) e bipedestación (ICC=0,90 novel 1, ICC= 0,92 novel 2) son case perfectas. Conclusións. Observouse que existe relación entre a DC e a FHP medida a través do CVA, significativa para a posición de bipedestación, pero non para a posición sedente. A fiabilidade inter e intraobservador en evaluadores noveles da medición do CVA, tanto en sedestación como en bipedestación, é excelente, demostrando que esta proba fotogramétrica é unha boa opción para evaluar a suxeitos con FHP por parte de evaluadores noveles.