caa a22 4500 386356408 CHVBK 20180307111854.0 cr unu---uuuuu 161130e198910 xx s 000 0 eng 10.1017/S0266462300008527 doi S0266462300008527 pii (NATIONALLICENCE)cambridge-10.1017/S0266462300008527 Test of a Noninvasive Instrument for Measuring Hemoglobin Concentration [Elektronische Daten] A colorimetric instrument for the noninvasive quantification of hemoglobin, designed using color shades resembling those observed in the conjunctiva, was tested. The instrument's colors are contrasted against the color of the conjunctiva to measure hemoglobin content. Sensitivity, specificity, negative predictive value, and false-negative value were estimated to test the instrument's accuracy; kappa coefficients were used to estimate inter- and intraobserver variability. Physician field evaluations of conjunctiva color for the screening of anemia, reported in the literature, have had sensitivities and specificities as high as 70%. Readings with the instrument demonstrated a 63% sensitivity, 72% specificity, and 38% false negatives for screening hemoglobin values of less than or equal to 13 g/dl. The interobserver kappa coefficients for three pairs of readers were good to excellent for the same hemoglobin screening value. Statistically significant differences were noted, however, between observers during the reliability test. The instrument can be used by unskilled personnel to improve their decision-making about whom to send for futher care or for supplementation with iron. Copyright © Cambridge University Press 1989 Sanchez-Carrillo Constanza I. Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico de Jesus Ramirez-Sanchez Teresita Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico Zambrana-Castañeda- Marcela Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico Selwyn Beatrice J. University of Texas School of Public Health, Houston International Journal of Technology Assessment in Health Care Cambridge University Press 5/4(1989-10), 659-667 0266-4623 5:4<659 1989 5 THC https://doi.org/10.1017/S0266462300008527 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0266462300008527 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sanchez-Carrillo Constanza I. Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico NATIONALLICENCE 700 1- de Jesus Ramirez-Sanchez Teresita Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico NATIONALLICENCE 700 1- Zambrana-Castañeda- Marcela Instituto Nacional de Salud Pública, Centro de Investigaciones en Salud Publica, Mexico NATIONALLICENCE 700 1- Selwyn Beatrice J. University of Texas School of Public Health, Houston NATIONALLICENCE 773 0- International Journal of Technology Assessment in Health Care Cambridge University Press 5/4(1989-10), 659-667 0266-4623 5:4<659 1989 5 THC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge