Ann Trop Paediatr
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To compare oxygen saturation levels (SaO(2)) by pulse oximetry among healthy Indian children aged from 1 month to 5 years age residing at two different altitudes, Chennai and the Shervaroy hills. ⋯ The reference value for mean SaO(2) in healthy children aged 1 month to 5 years in the Shervaroy hills (1500 m) was 97%, with the (-2 SD) values having a mean of 93% which is significantly lower than those living in Chennai (sea level), 99% of whom had a -2 SD mean of 96.6%.