## 3 Results
### Risk of Bias in Studies Included  
The publication bias in the majority of cases was low. In general, no high risk of bias was observed. The funnel plots are presented below with the results found for risk of bias with the different variables (Figure 2). As may be observed in the figure, one study by [PERSON] et al. (2018), which analyzed the mindfulness, depression, anxiety and stress variables, was the one at most risk of bias. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Results**} & \multirow{2}{*}{**k**} & \multirow{2}{*}{**SMD**} & \multicolumn{3}{c}{**95\% Confidence Interval**} & \multicolumn{2}{c}{**Significance**} & \multicolumn{2}{c}{**Heterogeneity**} \\ \cline{3-8}  & & & **Lower Limit** & **Upper Limit** & \(p\) & **Z** & \(P\)**(\%)** \\ \hline Mindfulness & & & & & & & \\ All data & 14 & \(-\)1.21 & \(-\)1.86 & \(-\)0.56 & \(<\)0.003 & 3.64 & 97\% \\ MAAS & 7 & \(-\)1.28 & \(-\)2.95 & 0.39 & 0.13 & 1.50 & 99\% \\ FFMQ (Multifaceted measurements) & 2 & \(-\)0.89 & \(-\)1.05 & \(-\)0.72 & \(<\)0.0001 & 10.56 & 0\% \\ FFMQ Observing & 2 & \(-\)1.04 & \(-\)1.41 & \(-\)0.67 & \(<\)0.0001 & 5.46 & 0\% \\ FFMQ Describe & 2 & \(-\)0.78 & \(-\)1.15 & \(-\)0.42 & 0.0001 & 4.18 & 2\% \\ FFMQ acting and awareness & 2 & \(-\)0.89 & \(-\)1.26 & \(-\)0.52 & \(<\)0.0001 & 4.75 & 0\% \\ FFMQ Non-reactivity & 2 & \(-\)1.10 & \(-\)1.48 & \(-\)0.72 & \(<\)0.0001 & 5.72 & 0\% \\ FFMQ Non-judging & 2 & \(-\)0.66 & \(-\)1.06 & \(-\)0.26 & 0.001 & 3.24 & 14\% \\ Other measurement instruments & 5 & \(-\)1.73 & \(-\)4.04 & 0.57 & 0.14 & 1.47 & 98\% \\ Depression, anxiety, and stress & & & & & & & \\ Depression & 7 & 1.43 & \(-\)0.05 & 2.92 & 0.06 & 1.90 & 98\% \\ Anxiety & 6 & 0.34 & 0.11 & 0.56 & 0.003 & 2.95 & 13\% \\ Stress & 16 & 1.55 & 1.09 & 3.01 & \(<\)0.0001 & 4.17 & 98\% \\ Affect & & & & & & & \\ Positive affect & 3 & \(-\)0.28 & \(-\)0.68 & 0.12 & 0.17 & 1.37 & 0\% \\ Negative affect & 4 & 0.42 & 0.09 & 0.75 & 0.01 & 2.53 & 0\% \\ Fatigue & 2 & 0.84 & 0.54 & 1.13 & \(<\)0.0001 & 5.57 & 0\% \\ Burnout & 4 & 2.02 & \(-\)0.84 & 4.87 & 0.17 & 1.38 & 99\% \\ Emotional exhaustion & 2 & 0.01 & \(-\)0.46 & 0.48 & 0.97 & 0.04 & 0\% \\ Engagement & 2 & 0.08 & \(-\)0.32 & 0.49 & 0.68 & 0.41 & 52\% \\ Resilience & 3 & \(-\)0.35 & \(-\)0.74 & 0.04 & 0.07 & 1.78 & 51\% \\ Wellbeing & 3 & \(-\)2.68 & \(-\)6.64 & 1.29 & 0.19 & 1.32 & 99\% \\ Sleep quality & 4 & 2.05 & \(-\)0.79 & 4.89 & 0.16 & 1.42 & 99\% \\ \hline \hline \end{tabular} Note. SMD\(=\) standardized mean difference. Instruments used: Mindfulness (CAMM, CAMS-R, FFMQ, FFM, Five-Facet Mindfulness Questionnaire, Freiburg Mindfulness Scale, KIMS, and MAAS); depression (BDI-II, CCAPS-34, CES-D, DASS21, and STAI); anxiety (CCAPS-34, DASS21, SAS and STAI); stress (C-SOSI, DASS21, EEP-14, PSM-9, PSS, PSS-10, PSS-14, PSM-9, and PSO); positive and negative affect (PANAS); fatigue (CIS, Fatigue Scale and the Checklist Individual Strength Questionnaire); burnout (BM, BO, MBL, and ProQOL); emotional exhaustion (CDFE and MBL); engagement (UWES); resilience (CD-RISE and CD-RISE10); engagement (UWES); wellbeing (WHO-Five); job satisfaction (JSQ); and, sleep quality (JS and PSQI).  
\end{table} 
Table 2: Mindfulness in the workplace and influence with different variables (meta-analytical estimates of effect). Figure 2: Risk of bias for all variables. (**a**) Mindfulness. (**b**) Depression and anxiety. (**c**) Negative and positive affects. (**d**) Emotional exhaustion and burnout. (**e**) Fatigue. (**f**) Stress. (**g**) Engagement. (**h**) Resilience. (**i**) Wellbeing. (**j**) Quality of sleep. mindfulness in the work context was an effective strategy, not only for reducing exhaustion and perceived stress, but also for increasing employee satisfaction [1]. The second hypothesis, in which it was expected that employees would show more engagement, mindfulness, and increased resilience, was supported by several studies. The study by [PERSON] and [PERSON] [33] found increased levels of mindfulness and engagement [17] after intervention in mindfulness.