Supporting information tableS4: Assocation rules of length 2 for type, duration and location of contacts with minimal support of 0.5%, significant positive dependence (0.01 significance level). Support, confidence, lift and ChiSquare values are given.

Antecedent / Consequent / Support / Confidence / Lift / ChiSquare
Physical Contacts
{duration=4 hours or more} / {type=physical} / 0.208 / 0.757 / 1.384 / 6292.654
{duration=1 hour - 4 hours} / {type=physical} / 0.156 / 0.649 / 1.186 / 1236.040
{frequency=daily} / {type=physical} / 0.308 / 0.646 / 1.180 / 3343.691
Non-physical Contacts
{duration=less than 5 min} / {type=non-physical} / 0.106 / 0.765 / 1.691 / 5953.343
{frequency=1st time} / {type=non-physical} / 0.058 / 0.745 / 1.647 / 2745.484
{duration=5-15 min} / {type=non-physical} / 0.102 / 0.639 / 1.412 / 2471.253
{frequency=a few times a year} / {type=non-physical} / 0.038 / 0.512 / 1.131 / 105.526
{frequency=weekly} / {type=non-physical} / 0.123 / 0.506 / 1.118 / 346.863
{frequency=monthly} / {type=non-physical} / 0.065 / 0.505 / 1.116 / 152.479
{duration=15 mins - 1 hour} / {type=non-physical} / 0.094 / 0.501 / 1.107 / 203.341
Duration less than 5 mins
{frequency=1st time} / {duration=less than 5 min} / 0.036 / 0.457 / 3.289 / 6707.882
{frequency=a few times a year} / {duration=less than 5 min} / 0.018 / 0.245 / 1.765 / 701.957
{type=non-physical} / {duration=less than 5 min} / 0.106 / 0.235 / 1.691 / 5953.343
{frequency=monthly} / {duration=less than 5 min} / 0.024 / 0.182 / 1.311 / 216.282
Duration 5-15 mins
{frequency=a few times a year} / {duration=5-15 min} / 0.019 / 0.262 / 1.649 / 591.579
{frequency=1st time} / {duration=5-15 min} / 0.021 / 0.262 / 1.648 / 629.858
{type=non-physical} / {duration=5-15 min} / 0.102 / 0.224 / 1.412 / 2471.253
{frequency=monthly} / {duration=5-15 min} / 0.028 / 0.218 / 1.371 / 359.816
{frequency=weekly} / {duration=5-15 min} / 0.045 / 0.185 / 1.166 / 155.678
Duration 15 mins-1 hour
{frequency=weekly} / {duration=15 mins - 1 hour} / 0.063 / 0.260 / 1.390 / 1045.781
{frequency=monthly} / {duration=15 mins - 1 hour} / 0.032 / 0.247 / 1.321 / 326.873
{type=non-physical} / {duration=15 mins - 1 hour} / 0.094 / 0.207 / 1.107 / 203.341
{frequency=a few times a year} / {duration=15 mins - 1 hour} / 0.015 / 0.206 / 1.102 / 17.644
Duration 1-4 hours
{frequency=weekly} / {duration=1 hour - 4 hours} / 0.073 / 0.301 / 1.254 / 611.511
{type=physical} / {duration=1 hour - 4 hours} / 0.156 / 0.285 / 1.186 / 1236.040
{frequency=monthly} / {duration=1 hour - 4 hours} / 0.036 / 0.279 / 1.160 / 111.312
Duration 4 hours or more
{frequency=daily} / {duration=4 hours or more} / 0.228 / 0.478 / 1.741 / 17673.855
{type=physical} / {duration=4 hours or more} / 0.208 / 0.380 / 1.384 / 6292.654
Frequency daily
{duration=4 hours or more} / {frequency=daily} / 0.228 / 0.830 / 1.741 / 17673.855
{type=physical} / {frequency=daily} / 0.308 / 0.562 / 1.180 / 3343.691
Frequency weekly
{duration=15 mins - 1 hour} / {frequency=weekly} / 0.063 / 0.337 / 1.390 / 1045.781
{duration=1 hour - 4 hours} / {frequency=weekly} / 0.073 / 0.304 / 1.254 / 611.511
{duration=5-15 min} / {frequency=weekly} / 0.045 / 0.283 / 1.166 / 155.678
{type=non-physical} / {frequency=weekly} / 0.123 / 0.271 / 1.118 / 346.863
Frequency Monthly
{duration=5-15 min} / {frequency=monthly} / 0.028 / 0.177 / 1.371 / 359.816
{duration=15 mins - 1 hour} / {frequency=monthly} / 0.032 / 0.170 / 1.321 / 326.873
{duration=less than 5 min} / {frequency=monthly} / 0.024 / 0.169 / 1.311 / 216.282
{duration=1 hour - 4 hours} / {frequency=monthly} / 0.036 / 0.149 / 1.160 / 111.312
{type=non-physical} / {frequency=monthly} / 0.065 / 0.144 / 1.116 / 152.479
Frequency few times a year
{duration=less than 5 min} / {frequency=a few times a year} / 0.018 / 0.130 / 1.765 / 701.957
{duration=5-15 min} / {frequency=a few times a year} / 0.019 / 0.122 / 1.649 / 591.579
{type=non-physical} / {frequency=a few times a year} / 0.038 / 0.083 / 1.131 / 105.526
{duration=15 mins - 1 hour} / {frequency=a few times a year} / 0.015 / 0.081 / 1.102 / 17.644
Frequency first time
{duration=less than 5 min} / {frequency=1st time} / 0.036 / 0.257 / 3.289 / 6707.882
{duration=5-15 min} / {frequency=1st time} / 0.021 / 0.129 / 1.648 / 629.858
{type=non-physical} / {frequency=1st time} / 0.058 / 0.129 / 1.647 / 2745.484

TableAR 2: Assocation rules of length 3 for type, duration and location of contacts with minimal support of 0.5%, significant positive dependence (0.01 significance level). Support, confidence, lift and ChiSquare values are given.

Antecedent / Consequent / Support / Confidence / Lift / ChiSquare
Physical Contacts
{frequency=daily,
duration=4 hours or more} / {type=physical} / 0.175 / 0.768 / 1.403 / 5417.848
{frequency=a few times a year,
duration=1 hour - 4 hours} / {type=physical} / 0.011 / 0.703 / 1.283 / 139.013
{frequency=monthly,
duration=1 hour - 4 hours} / {type=physical} / 0.024 / 0.680 / 1.242 / 245.854
{frequency=weekly,
duration=4 hours or more} / {type=physical} / 0.020 / 0.665 / 1.214 / 157.458
{frequency=daily,
duration=1 hour - 4 hours} / {type=physical} / 0.071 / 0.657 / 1.201 / 553.525
{frequency=weekly,
duration=1 hour - 4 hours} / {type=physical} / 0.047 / 0.638 / 1.165 / 243.177
Non-physical Contacts
{frequency=1st time,
duration=less than 5 min} / {type=non-physical} / 0.030 / 0.829 / 1.833 / 1986.357
{frequency=monthly,
duration=less than 5 min} / {type=non-physical} / 0.019 / 0.799 / 1.766 / 1088.622
{frequency=weekly,
duration=less than 5 min} / {type=non-physical} / 0.025 / 0.774 / 1.710 / 1287.780
{frequency=1st time,
duration=5-15 min} / {type=non-physical} / 0.016 / 0.764 / 1.688 / 765.424
{frequency=a few times a year,
duration=less than 5 min} / {type=non-physical} / 0.014 / 0.760 / 1.679 / 654.757
{frequency=daily,
duration=less than 5 min} / {type=non-physical} / 0.019 / 0.655 / 1.448 / 473.206
{frequency=weekly,
duration=5-15 min} / {type=non-physical} / 0.029 / 0.653 / 1.442 / 709.912
{frequency=monthly,
duration=5-15 min} / {type=non-physical} / 0.018 / 0.648 / 1.432 / 415.809
{frequency=a few times a year,
duration=5-15 min} / {type=non-physical} / 0.011 / 0.589 / 1.303 / 139.323
{frequency=daily,
duration=5-15 min} / {type=non-physical} / 0.027 / 0.585 / 1.292 / 318.137
{frequency=weekly,
duration=15 mins - 1 hour} / {type=non-physical} / 0.032 / 0.513 / 1.133 / 91.408
{frequency=daily,
duration=15 mins - 1 hour} / {type=non-physical} / 0.032 / 0.500 / 1.105 / 58.456
Duration less than 5 mins
{frequency=1st time,
type=non-physical} / {duration=less than 5 min} / 0.030 / 0.509 / 3.660 / 6606.551
{frequency=a few times a year,
type=non-physical} / {duration=less than 5 min} / 0.014 / 0.364 / 2.619 / 1550.090
{frequency=monthly,
type=non-physical} / {duration=less than 5 min} / 0.019 / 0.289 / 2.076 / 1213.797
{frequency=weekly,
type=non-physical} / {duration=less than 5 min} / 0.025 / 0.202 / 1.452 / 431.273
Duration 5-15 mins
{frequency=a few times a year,
type=non-physical} / {duration=5-15 min} / 0.011 / 0.302 / 1.899 / 559.471
{frequency=monthly,
type=non-physical} / {duration=5-15 min} / 0.018 / 0.280 / 1.760 / 709.064
{frequency=1st time,
type=non-physical} / {duration=5-15 min} / 0.016 / 0.269 / 1.689 / 519.487
{frequency=weekly,
type=non-physical} / {duration=5-15 min} / 0.029 / 0.239 / 1.503 / 625.588
Duration 15 mins - 1 hour
{frequency=monthly,
type=physical} / {duration=15 mins - 1 hour} / 0.017 / 0.270 / 1.442 / 286.249
{frequency=weekly,
type=non-physical} / {duration=15 mins - 1 hour} / 0.032 / 0.263 / 1.408 / 499.370
{frequency=weekly,
type=physical} / {duration=15 mins - 1 hour} / 0.031 / 0.256 / 1.372 / 404.094
{frequency=monthly,
type=non-physical} / {duration=15 mins - 1 hour} / 0.015 / 0.225 / 1.202 / 60.750
Duration 1-4 hours
{frequency=weekly,
type=physical} / {duration=1 hour - 4 hours} / 0.047 / 0.389 / 1.620 / 1545.723
{frequency=monthly,
type=physical} / {duration=1 hour - 4 hours} / 0.024 / 0.383 / 1.592 / 705.511
{frequency=a few times a year,
type=physical} / {duration=1 hour - 4 hours} / 0.011 / 0.295 / 1.226 / 56.187
Duration 4 hours or more
{frequency=daily,
type=physical} / {duration=4 hours or more} / 0.175 / 0.569 / 2.070 / 17999.903
{frequency=daily,
type=non-physical} / {duration=4 hours or more} / 0.053 / 0.313 / 1.141 / 142.275
Frequency daily
{type=physical,
duration=4 hours or more} / {frequency=daily} / 0.175 / 0.841 / 1.766 / 13090.923
{type=non-physical,
duration=4 hours or more} / {frequency=daily} / 0.053 / 0.793 / 1.664 / 2674.203
Frequency weekly
{type=non-physical,
duration=15 mins - 1 hour} / {frequency=weekly} / 0.032 / 0.345 / 1.422 / 550.743
{type=physical,
duration=15 mins - 1 hour} / {frequency=weekly} / 0.031 / 0.329 / 1.358 / 393.641
{type=non-physical,
duration=1 hour - 4 hours} / {frequency=weekly} / 0.026 / 0.314 / 1.295 / 239.491
{type=physical,
duration=1 hour - 4 hours} / {frequency=weekly} / 0.047 / 0.299 / 1.232 / 298.223
{type=non-physical,
duration=5-15 min} / {frequency=weekly} / 0.029 / 0.289 / 1.191 / 123.397
{type=physical,
duration=5-15 min} / {frequency=weekly} / 0.016 / 0.272 / 1.122 / 26.910
Frequency monthly
{type=physical,
duration=15 mins - 1 hour} / {frequency=monthly} / 0.017 / 0.185 / 1.431 / 264.204
{type=non-physical,
duration=5-15 min} / {frequency=monthly} / 0.018 / 0.179 / 1.391 / 238.364
{type=non-physical,
duration=less than 5 min} / {frequency=monthly} / 0.019 / 0.177 / 1.369 / 224.010
{type=physical,
duration=1 hour - 4 hours} / {frequency=monthly} / 0.024 / 0.157 / 1.214 / 117.024
{type=non-physical,
duration=15 mins - 1 hour} / {frequency=monthly} / 0.015 / 0.156 / 1.211 / 63.476
Frequency few times a year
{type=non-physical,
duration=less than 5 min} / {frequency=a few times a year} / 0.014 / 0.129 / 1.752 / 499.896
{type=non-physical,
duration=5-15 min} / {frequency=a few times a year} / 0.011 / 0.112 / 1.522 / 228.573
Frequency first time
{type=non-physical,
duration=less than 5 min} / {frequency=1st time} / 0.030 / 0.279 / 3.565 / 6207.346
{type=non-physical,
duration=5-15 min} / {frequency=1st time} / 0.016 / 0.154 / 1.971 / 845.487