# **Table S1: Parameter Estimates from Stepwise Regression**

# **(a) Standard Stepwise Logistic**

|**Stepwise Logistic**|||
|---|---|---|
||Coefficient|<br>SE|
|Number of places visited (Isaacman et al., 2011)|0.029<sup>***</sup>|(0.011)|
|Fraction of outgoing duration during working hours|0.959<sup>***</sup>|(0.283)|
|SD of daily outgoing SMS on days when it is above zero|0.791<sup>***</sup>|(0.200)|
|SD of daily outgoing SMS|-0.066|(0.063)|
|Max daily outgoing SMS|-0.004|(0.005)|
|Q80 of outgoing SMS on days when it is above zero|-0.038<sup>**</sup>|(0.018)|
|SD of daily outgoing calls|4.938<sup>***</sup>|(1.781)|
|SD of daily outgoing calls (between first and last days with activity)|-5.240<sup>***</sup>|(1.778)|
|SD of weekly outgoing duration|-16.786<sup>***</sup>|(2.761)|
|SD of weekly outgoing duration (between first and last weeks with activity)|16.874<sup>***</sup>|(2.765)|
|Q80/(Q80-Q50) of daily outgoing duration (between first and last days with activity)|0.157|(0.175)|
|Q50-Q20 of daily outgoing duration, on days when it is above zero|-0.001<sup>***</sup>|(0.0002)|
|Q60/(Q60-Q40) of daily outgoing duration (after first day with activity)|0.260<sup>**</sup>|(0.102)|
|Magnitude of strongest repeating temporal pattern in daily outgoing SMS (Fourier transform)|0.002|(0.003)|
|Magnitude of second strongest repeating temporal pattern in daily outgoing SMS (Fourier transform)|-0.002|(0.003)|
|Magnitude of third strongest repeating temporal pattern in daily outgoing SMS (Fourier transform)|0.006<sup>***</sup>|(0.002)|
|Ratio of magnitude of strongest repeating temporal pattern in daily outgoing SMS to sum of magnitudes<br>of all other patterns (Fourier transform)|36.902<sup>**</sup>|(17.825)|
|Ratio of magnitude of strongest repeating temporal pattern in daily outgoing SMS to magnitudes of<br>third strongest patterns, after first SMS (Fourier transform)|0.519<sup>**</sup>|(0.255)|
|Ratio of magnitude of strongest repeating temporal pattern in daily outgoing SMS to sum of magnitudes<br>of all other patterns, after first SMS (Fourier transform)|-130.552<sup>**</sup>|(53.701)|
|Ratio of magnitude of strongest repeating temporal pattern in daily outgoing SMS to sum of magnitudes<br>of all other patterns, between first and last weeks with activity (Fourier transform)|78.901|(51.873)|
|7 day lagged spearman autocorrelation of outgoing SMS (between first and last days with activity)|1.024<sup>***</sup>|(0.330)|
|Magnitude of second strongest repeating temporal pattern in weekly outgoing SMS (Fourier transform)|0.033<sup>***</sup>|(0.012)|
|Ratio of magnitude of strongest repeating temporal pattern in weekly outgoing SMS to sum of<br>magnitudes of all other patterns (Fourier transform)|-0.692|(0.475)|
|Magnitude of strongest repeating temporal pattern in weekly outgoing SMS, between first and last days<br>with activity (Fourier transform)|-0.004|(0.002)|
|Magnitude of second strongest repeating temporal pattern in weekly outgoing SMS, between first and<br>last days with activity (Fourier transform)|-0.030<sup>**</sup>|(0.012)|
|2 month lagged autocorrelation of monthly outgoing SMS|14.030|(293.357)|
|Ratio of magnitude of strongest repeating temporal pattern in daily outgoing duration to sum of<br>magnitudes of all other patterns (Fourier transform)|-12.447<sup>***</sup>|(3.335)|
|Ratio of magnitude of weekly temporal pattern in daily outgoing duration to sum of magnitudes of all<br>other patterns (Fourier transform)|-4.377|(2.790)|
|Difference in magnitudes of strongest and second strongest repeating temporal pattern in weekly<br>outgoing duration (Fourier transform)|0.00002<sup>**</sup>|(0.00001)|

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