Table 1 Output of GLMM models for effect of room type, floor level, carpet, windows, and doors on arthropod diversity at the morphospecies (A) and family (B) levels. For categorical variables, common rooms, ground level, and carpeted rooms are set as baseline values, and models are fit with Poisson distributions. numMS = Number of morphospecies; numFam = number of families; roomType = whether room was an attic, basement, bathroom, bedroom, or common room; floorLevel3 = whether room was subterranean, ground level, or above ground level; numWindow = number of windows in room that led to the outside; numDoor = number of doors in room that led to the outside; carpet = whether or not room was carpeted.

From: The Habitats Humans Provide: Factors affecting the diversity and composition of arthropods in houses

Variable Estimate Std. Error z value Pr(>|z|)
A. AIC = 5143.6, BIC = 5193.1
Formula: numMS ~ roomType + floorLevel3 + numWindow + numDoor + carpet + (1|houseID)
 (Intercept) 3.443703 0.087043 39.56 <0.001
 Room Type (attic) −1.159753 0.138444 −8.38 <0.001
 Room Type (basement) −1.061511 0.08444 −12.57 <0.001
 Room Type (bathroom) −1.113023 0.042995 −25.89 <0.001
 Room Type (bedroom) −0.685018 0.034758 −19.71 <0.001
 Room Type (kitchen) −0.731902 0.048708 −15.03 <0.001
 Floor level (subterranean) 0.73038 0.078324 9.33 <0.001
 Floor level (above ground level) −0.44685 0.003749 10.63 <0.001
 No Carpet −0.235563 0.033441 −7.04 <0.001
 # of Windows 0.039849 0.003749 10.63 <0.001
 # of Doors 0.076138 0.013764 5.53 <0.001
B. AIC = 3746.0, BIC = 3795.5
Formula: numFam ~ roomType + floorLevel3 + numWindow + numDoor + carpet + (1|houseID)
 (Intercept) 3.007044 0.080465 37.37 <0.001
 Room Type (attic) −1.169549 0.15963 −7.33 <0.001
 Room Type (basement) −0.863172 0.101692 −8.49 <0.001
 Room Type (bathroom) −1.011451 0.050215 −20.14 <0.001
 Room Type (bedroom) −0.581422 0.040989 −14.18 <0.001
 Room Type (kitchen) −0.601813 0.056649 −10.62 <0.001
 Floor level (subterranean) 0.69076 0.095808 7.21 <0.001
 Floor level (above ground level) −0.308457 0.039926 −7.73 <0.001
 No Carpet −0.139677 0.039105 −3.57 <0.001
 # of Windows 0.038071 0.004524 8.42 <0.001
 # of Doors 0.05982 0.016774 3.57 <0.001