ObjectiveNeedlestick and sharps injuries among healthcare workers (HCWs) pose significant occupational health problems. We aim to provide incidence and other epidemiological aspects of needlestick and sharp injuries (NSSIs) among HCWs in a tertiary teaching hospital in Indonesia, to inform the evaluation of NSSIs prevention programme.MethodsA cohort study was conducted at Cipto Mangunkusumo Hospital in Jakarta. We analysed data of the sharps injury programme at the hospital between January 2014 and December 2017. Incidence of NSSIs was calculated per 1000 person-years (1000-PY).ResultsOver the 4-year period, a total of 286 NSSIs were reported. The mean NSSIs incidence rate for 4 years was 13.3/1000-PY, peaking in 2015 (15.5/1000-PY) then decreasing afterward. Most NSSIs were experienced by nurses (42.7%), but the highest incidence was among midwives (18.9/1000-PY), followed by nurses, medical students and medical doctors (15.2/1000-PY, 12.6/1000-PY and 11.8/1000-PY, respectively). The devices causing the highest proportion of NSSIs were hollow-bore needles (66.8%), followed by suture needles (14.3%) and solid needles (10.8%). 9.4% of NSSIs were related to insulin pen injection. Of all the incidents, 31.3% occurred during surgical procedures, 25.9% during blood collections, 14.3% during administering injection of drugs and 13.3% during waste cleaning.ConclusionIn conclusion, this study showed varied incidences of NSSI among different occupations, with the highest among midwives and nurses. Many unsafe work practices still continue, which is of utmost concern. We suggest opportunities for prevention including training and cultivating safer workplace practices.