Effectiveness of intensive healthcare waste management training model among health professionals at teaching hospitals of Pakistan: a quasi-experimental study

Background Infectious waste management has always remained a neglected public health problem in the developing countries, resulting in high burden of environmental pollution affecting general masses. Health workers are the key personnel who are responsible for the management of infectious waste at any hospital, however, their proper training and education is must for an optimal performance. This interventional study was conducted to assess the effectiveness of Intensive healthcare waste management (IHWM) training model at two tertiary care hospitals of Rawalpindi city, Pakistan. Methods This study was quasi-experimental pre and post design with control and intervention groups. Out of 275 health care workers enrolled for the study, 138 workers were assigned for intervention group for 3 months trainings, hands-on practicum and reminders on infectious waste management; whereas 137 workers were assigned to the control hospital where routine activities on infectious health care waste management were performed. Pre and post intervention assessment was done for knowledge, attitude and practices (KAP); and was statistically analyzed. Bivariate and multivariate analysis, independent, paired and unpaired t-test, chi-square with p values, and mean of the responses were calculated. Overall the response rate was 92% at the end of intervention. Results During the baseline survey, 275 healthcare workers (HCW) included doctors, nurses, paramedics and sanitary workers, and after 3 months of intervention, 255 were reached out to complete the questionnaire. With regard to KAP at baseline, there were no significant differences between two groups at baseline, except for gender and department. However, in the post intervention survey, statistically significance difference (<0.05) between intervention and control group’s knowledge, attitude and practices was found. Moreover, within the control group no statistically significant difference was reported (>0.05) after 3 months. Conclusions Study results suggest that IHWM training could be an effective intervention for improving knowledge, attitudes and practices among health workers regarding infectious waste management. Such training should become a regular feature of all hospitals for reducing the hazards attached with infectious wastes.


Background
Across the world, tertiary hospitals face huge challenge of ensuring an infection free environment for their clients [1]. Compounding the situation are the poor infectious waste management practices among health care workers in the hospitals, which pose a big public health threat [2]. Improper management of infectious waste frequently infects the health workers with Hepatitis B & C, typhoid, cholera, tuberculosis, skin infections, respiratory infections and HIV/AIDS [3,4]. The infectious healthcare waste is considered to be the second most risky waste in the world that should be handled properly by the trained staff within an organization. Infectious waste is produced during the patient care at hospitals, clinics, maternity homes and research institutes [5]. Medical waste produced by each bed across the world ranges from 0.5-2 kg/day [6].
Quantity of infectious hospital waste produced in Pakistan is not different from the global figures [7]. Proper periodic training is therefore needed for to improve the knowledge, attitude and practices of health workers who are handling the waste in routine [2]. Scavengers and waste handlers with low socio economic groups are more involved in the recycling of used syringes at developing countries and get frequent needle prick injuries [8]. These poor practices of waste management are reported in India, China and Bangladesh too, resulting in environmental threats to the populations as well as major occupational risk [9].
Studies also suggested that the practices of health care workers are not up to the standards which lead to major threats of environmental pollution. Segregation is the main step which is not being practiced in the hospitals by health staff. One possible reason is lack of training [10]. A recent study has also reported that the waste management practices even among general practitioners were not appropriate, hence this group too needs to be trained [11]. Support from hospital administration is critical for conducting the regular training and refresher courses for staff handling infectious wastes [7,12]. Most of the waste produced from the hospital is noninfectious which can easily be managed through local municipality; but 10-15% infectious waste needs special attention by the trained health staff, otherwise this small proportion may contaminate the entire lot. This hazard can only be averted if waste handling staff is trained in segregation technique at point source [13].
Hitherto, there has been no study to assess the effectiveness of infectious waste management training in Pakistan. Our interventional study was conducted through implementation of a new training model comprising deductive training, hands-on practicum and a reminder service in a tertiary care hospital with the objective to assess its effects on knowledge, attitude and practices of health care workers vis-à-vis infectious waste management in tertiary hospitals in Pakistan.

Methods
This was a quasi-experimental with control and intervention design conducted at two teaching hospitals located at Rawalpindi city-Pakistan from October 2013 to March 2014. Pre and post measurements were made through the World Health Organization (WHO) tool which was modified, pretested, piloted on 30 HCWs in adjacent district with similar kind of hospital before the study [14]. The internal consistency of the questionnaires was measured through Cronbach alpha for attitude and practice (0.92) and Kuder-Richardson (K-R 20) for knowledge (0.81) [15]. Sample size were calculated by using the 80% power, 0.05 alpha with 20% difference, and 275 health professionals including doctors, nurses, paramedics and sanitary workers were selected for this interventional study. These HCWs were selected randomly from employees list obtained from administration of both the hospitals and were invited for voluntary participation in the study. Hence, 138 HCWs for intervention and 137 HCWs were included in the control hospital, after obtaining written consent. The intervention and control hospital both are government tertiary healthcare facilities, therefore, using pick from hat method, one was labeled as intervention and other as control site. All HCWs were regular employees; and therefore students, house officers and trainee doctors were not included. 20 HCWs were dropped out due their transfer, causal leave or refusal ( Figure 1).
Data were collected through self-administered questionnaire from doctors, nurses and paramedics, however, this instrument translated into local language to make it understandable even for the sanitary staff with low or no schooling, ensuring that they can read and understand the questions. Data collectors were selected from the other city and they had no affiliation with the study hospitals. They were trained before the study by the principal investigator. Research Ethics Committee of Health Services Academy, Pakistan (F.No.3-107/2013-IERC/ HSA) approved the study; while institutional permission was also taken from the heads of both hospitals.

Statistical analysis
SPSS version 22 was used for data analysis during this study [16]. The statistical analyses were performed to see the effect of the several individual characteristics on the outcomes of interest (knowledge, attitude and practices) by using appropriate bivariate analysis such as chisquare test for categorical variables and t-test for continuous variables. Paired and unpaired t test were used to see the effectiveness of training model with and within the groups. Then, multivariate linear and logistic regression was performed. Main outcome of interest was improved practices about infectious waste management (no = 0, yes = 1), knowledge about segregation, collection, storage and disposal (no = 0, yes = 1), and the attitude was measured through 5 point Likert's scale. There were 24 statements for knowledge, 12 for attitude and 20 for practices; their mean score of responses were calculated and finally grouped in different levels. Baseline was conducted before the intervention and endline was conducted after 3 months period. Three months were allocated for intervention period.   previous training models based on behavioral change theories [17].
The frequency of routine work and improved quality of practice regarding the infectious waste management were expected outcomes of this training. We implemented this training model for three months in the intervention hospital only; while the regular activities went on in the control hospital. Three training sessions each with 6 hours contact were conducted for HCWs in the intervention arm with four week interval between the two training. Training was followed by hands-on practicum demonstration for 6 hours duration each on the use of Personal Protective Equipment (PPE) and different steps of infectious waste management. PPE were also provided during the study to see the proper effectiveness of this training model. Third approach of this training model was the reminder services on infectious waste management which were given through administrators of the concerned departments during weekly morning meeting for three months. Trainings modules were adopted from WHO manual and guidelines on hospital waste management and hospital waste management rules 2005 [14,18,19].

Results
Total 275 subjects were included in the baseline and final 255 have completed the intervention (92%) and were included in the final data analysis at endline. About the training, participants enjoyed the whole experience and shared their positive comments about the objectives, content, approach, material, ambiance and quality of instruction. Table 1 presents the socio-demographic characteristics of health care workers in both hospitals. Nearly half (47%) of the participants in intervention group and (42%) in the control group belong to age < 25 years. About gender distribution, the M:F ratio was 47:53 in intervention group, and 66:34 in the control group. More than one third in control as well as intervention group had graduation level of education. Almost half (49%) of the subjects from the intervention hospital were working in medicine department; while 37% were working in emergency and operation theaters in control group. Majority (54%) of the HCWs in control group and 47% of the HCWs in intervention group had working experience of less than 5 years. HCWs were assigned in two groups, health staff 81% in intervention and 80% in control hospital which includes doctors, nurses and paramedics; while the other group comprised of sanitary workers-19% in intervention and 20% in control. Age, educational status, income, experience and cadre had no significant association with KAP in both groups; while gender and affiliated department had statistically significance association with KAP in both the groups (p < 0.05). The respondent's knowledge about different steps of infectious waste is presented in Table 2. The analysis of the knowledge questions showed that the frequencies of the correct answers varied from 35% to 85%. Knowledge has increased in the intervention group after the successful training model intervention from 20-25%; while in the control group only 1-3% knowledge has improved. Table 3 shows that the HCWs in both intervention and control groups were tested by using independent sample t test and chi-square before the intervention to find any significant difference regarding knowledge, attitude and practices between the two groups. The score was added to find the mean score. However, there were no statistically significant differences found between the groups at the baseline, before to start the intervention (p >0.05). Table 4 shows the statistical change of knowledge, attitude and practices regarding infectious waste management before and after the intervention by comparing mean score within the groups. Mean score was calculated by adding up the score on correct response. Wilcoxon signed Rank test was used to determine the mean difference between the knowledge and practices of the HCWs before and after the intervention within the groups, there was a significant difference in knowledge, attitude and practices (p < 0.05) has been reported in intervention group. However, no statistically significant difference within control group before and after was reported. For attitude of the HCWs, paired sample t-test was used to determine the mean difference in attitude before and after the intervention. In the intervention group, there was a significant difference p < 0.05; however, in the control group there was no significant difference.

Trainings on infectious waste
This interventional study is one its own kind of research which has meticulously dealt with HCW's knowledge, attitudes, and practices towards infectious waste management. Training model has proved that a continuous education of professionals could improve their overall approach toward the infectious waste management. Other studies also suggested that such trainings are very important to improve the waste handling practices of the staff in hospital environment [7,20]. Improper waste handling could only be minimized through continuous education of workers at their duty stations [11]. Another study has reported that HCWs must need regular information and reinforcing messages on the management of infectious waste [21]. Performance of health workforce could be enhances by intensive and then periodic refresher training [22].

Reminder services
One of the components of our training model was reminder service by hospital administration given during their weekly staff meeting on regular basis for three months that would encourage all the employees to improve their attitude at their working place. This newly developed component of reminder services was previously never tried during various operations researches on infectious waste management. Nevertheless, these reminder services have successfully proved to achieve health behavior modification [17]. Therefore, this study included the reminder service managed by the hospital administration as part of the intervention, with an expectation that it would help sustain good health waste management practices.

Hands-on practicum
This has been observed that the usage of Personnel Protective Equipment (PPE) during the study through hands-on practical demonstration in intervention hospital has brought the positive results in improving the proper practice of waste handling. Hence, it means that the practices of staff invariably depend on the availability of the PPE such as, aprons, masks, rubber boots etc. There was no change in practices reported in the control hospital unquestionably because of the non-availability of these PPE. Individual trainings with demonstration are the most efficient approach to instruct and visualize the proper techniques to use PPE. Our study also showed that the workers lack proficiency in practicing the proper waste bin color coding and the use of PPE at their work place. This could be improved with the support of the hospital management and by allocating the proper budget for periodic trainings on all such aspects in a tertiary hospital [23]. It has also been reported that there is very small gain in mean of knowledge, attitude and practices with in the control group. The possible reason is evident: no training no practicum and no reminder service. Literature proved that the practical demonstration has positively influence the practices of an individual and their behavior at their work place [24]. Face to face trainings has been proven to be one of more effective strategies for improving the practices and health behavior, especially when combined with other training interventional approaches [25]. Some of the limitations of our study are that these findings may not be applied at every level of healthcare facility in the country, and results represent only tertiary care setting; and that too in a relatively short experience. Due to limited finances, we could not offer any monetary incentives to the study participants. As both the hospital were located at the same city there was a slight probability of contamination between the groups. However, the distance between both hospitals was more than 5 kilometers. Lastly, this intervention might not have benefited all the health care workers due to the nature and time constraints for the intervention.

Conclusion
This study is just an entré into this field and evaluations performed over longer periods in multiple hospitals and at different levels of care would definitely yield even richer evidence. Statistical analyses of the knowledge, attitude and practices of the trained staff after a year or so will potentially present an impact inference of this training. Hospitals must plan periodic evaluations after this training to gauge the change in the behaviors too, once the changes in facilities are instituted for the