## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Reference** & **Wearable** & **Predictive** & **Prediction Outcome** & **Ground Truth** & **Quality Measures** \\  & **Specifications** & **Features** & & **Determination** & **(Best Model)** \\ \hline \multirow{4}{*}{[PERSON] et al., 2019 [57]} & \multirow{4}{*}{Mi band-3} & Selected 9 questions of the & \multirow{4}{*}{Detect current} & \multirow{4}{*}{HDRS-21} & Accuracy = 99.01\% \\  & & HDRS-21 & & & Sensitivity = 98.4\% \\  & & Activity & yes/no) & & Specificity = 98.87\% \\  & & & yes/no) & & F1 = 0.98 \\  & & & & PPV = 97.54\% \\ \hline \multirow{4}{*}{[PERSON] et al., 2022 [58]} & \multirow{4}{*}{FitBit: model n.s.} & \multirow{4}{*}{Predict current PHQ-9} & \multirow{4}{*}{PHQ-9 measured at \(\kappa=0.476\)} \\  & & predicted) & & & Adjacent \\  & & Lifestyle & & accuracy = 77.6\% \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & Changes & & & \\ \cline{3-5}  & & Activity & Sleep & & & \\ \cline{3-5}  & & Sleep & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{[PERSON] et al., 2022 [59]} & \multirow{4}{*}{FitBit Inspire HR; software version 1.84.5} & \multirow{4}{*}{Heart rate} & \multirow{4}{*}{Predict current PHQ-9 score} & \multirow{4}{*}{Weekly PHQ-9} & MAE = 2.39 \\  & & & & & MSE = 10.28 \\ \cline{3-5}  & & & score & & MAPE = 0.27 \\ \cline{3-5}  & & software version & Sleep & & RMSE = 2.83 \\ \cline{3-5}  & 1.84.5 & Steps & & & \\ \cline{3-5}  & Smartphone: & Phone use & & & \\ \cline{3-5}  & Android, iOS & Location & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{[PERSON] et al., 2020 [60]} & \multirow{4}{*}{Empatica E4 wristbands (both wrists) Smartphone: Android} & \multirow{4}{*}{EDA Heart rate Activity Phone use} & \multirow{4}{*}{Predict the current HDRS-17 score} & HDRS-17 score derived from biweekly HDRS-28 measurements & MAE = 4.08 \\  & & & & & \\ \cline{3-5}  & & Activity & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{[PERSON] et al., 2021 [61]} & \multirow{4}{*}{FitBit Charge 2} & \multirow{4}{*}{Sleep Circadian rhythms} & \multirow{4}{*}{Detect current depression (depressed yes/no)} & Depression is classified based on PHQ-9 with a cut-off of 8 (mild or worse) & Accuracy = 80\% \\  & & & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{[PERSON] et al., 2020 [62]} & \multirow{4}{*}{Silmee W20 twistband} & \multirow{4}{*}{Skin temperature UV light exposure} & \multirow{4}{*}{Detect current HDRS-17 score} & \multirow{4}{*}{HDRS-17 by clinician} & \multirow{4}{*}{R = 0.61} \\  & & & & & \\ \cline{3-5}  & & Activity & & & \\ \cline{3-5}  & & Sleep & & & \\ \cline{3-5}  & & Heart rate & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{[PERSON] et al., 2020 [62]} & \multirow{4}{*}{Silmee W20 twistband} & \multirow{4}{*}{Skin temperature UV light exposure} & \multirow{4}{*}{Detect the current HDRS-17 score} & \multirow{4}{*}{HDRS-17 by clinician} & \multirow{4}{*}{R = 0.61} \\  & & & & & \\ \cline{3-5}  & & & & & \\ \hline \multirow{4}{*}{AUC = Area Under Curve. AUPRC = Area Under Precision Recall Curve. BDI-II = Beck Depression Inventory-II DSM-5: Diagnostic and Statistical Manual of Mental Disorders, 5 th edition. EDA = Electrodermal Activity. EMA = Ecological Momentary Assessment. HDRS-17/21 = Hamilton Depression Rating Scale with 17 or 21 items. MADRS = Montgomery Asberg Depression Rating Scale. MAE = Mean Absolute Error. MAPE = Mean Absolute Percentage Error. MSE = Mean Squared Error. n.s. = not specified. OS = Operating System. PHQ-9 = Patient Health Questionnaire-9. PVP = Positive Predictive Value. PSOI = Pittsburg Sleep Quality Index. QIDS = Quick Inventory of Depressive Symptomatology. RMSE = Root Mean Square Error. SGDS = Short Portarit: Depression Scale. UV = Ultraviolet. YMRS = Young Mania Rating Scale. 1 Multiple models were made to distinguish between different subgroups. The reported ranges encompass the quality measures of the best model for each distinction. \\ \cline{3-5}  & & & & \\ \hline \hline \end{tabular}
\end{table}