Abstract: An apparatus for measuring a quantity of an analyte, such as an aldehyde, contained in a breath sample includes a breath collection device and a measurement device. The breath collection device includes a breath inlet area, a breath outlet area, and a reaction chamber. The reaction chamber can include a reagent that is colorimetrically reactive with one or more aldehydes. The measurement device includes a light emitting device and a light measuring device and is configured to provide a quantitative value indicative of the amount of aldehydes present in the breath sample.

Abstract: Methods and hand-held devices non-invasively measure a health parameter in an individual or a plurality of individuals. Plural hand-held devices may be provided to plural individuals. Each device may compute a score based on the assayed health parameter in the individual. A server on a computer network may receive the scores and determine a pattern based on the scores. The hand-held devices may be further configured to receive additional data from the individuals regarding activities that may affect the individuals' scores. The server may receive the additional data from the devices and determine additional patterns.

Abstract: Methods and hand-held devices non-invasively measure a health parameter in an individual or a plurality of individuals. Plural hand-held devices may be provided to plural individuals. Each device may compute a score based on the assayed health parameter in the individual. A server on a computer network may receive the scores and determine a pattern based on the scores. The hand-held devices may be further configured to receive additional data from the individuals regarding activities that may affect the individuals' scores. The server may receive the additional data from the devices and determine additional patterns.