Table 4.

Probability distribution for cause and mechanism of injury, place of occurrence, and activity at time of injury conditional on four classes of fall injury episodes, among adults ages 50 and older, United States, National Health Interview Survey, 2004–2013

	Class 1 Residential	Class 2 Occupational	Class 3 Leisure	Class 4 Homebound Residential
Class Size (n = 2,254a)	0.403	0.152	0.127	0.318
Cause
Slipping or tripping	0.608	0.701	0.693	0.322
Jumping or diving	0.002	0.003	0.000	0.000
Bumping into an object or another person	0.023	0.035	0.024	0.010
Being shoved or pushed by another person	0.003	0.008	0.010	0.000
Losing balance or having dizziness (fainting or a seizure)	0.182	0.070	0.126	0.481
Other	0.182	0.184	0.147	0.188
Mechanism
Stairs, steps, or escalator	0.306	0.121	0.073	0.000
Floor or level ground	0.364	0.486	0.207	0.599
Curb (including sidewalk)	0.033	0.042	0.348	0.000
Ladder or scaffolding	0.065	0.036	0.000	0.000
Sports field, court, or rink	0.000	0.000	0.080	0.000
Building or other structure	0.007	0.035	0.000	0.005
Chair, bed, sofa, or other furniture	0.000	0.015	0.005	0.144
Bathtub, shower, toilet, or commode	0.000	0.000	0.001	0.120
Hole or other opening	0.026	0.019	0.026	0.000
Other	0.198	0.245	0.260	0.132
Place of occurrence
Home (inside)	0.407	0.024	0.000	0.943
Home (outside)	0.561	0.011	0.238	0.012
School, child care center, or preschool	0.000	0.038	0.011	0.000
Hospital or residential institution	0.002	0.135	0.030	0.031
Street including highway, sidewalk, or parking lot	0.010	0.092	0.394	0.000
Recreation—sport facility, recreation area, lake, river, or pool	0.000	0.000	0.283	0.000
Commercial—trade or service area	0.000	0.265	0.000	0.000
Commercial area—industrial, construction area, or farm	0.002	0.083	0.003	0.000
Other public building	0.000	0.112	0.012	0.002
Other places, not specified	0.017	0.241	0.028	0.012
Activity at time of injury
Driving or riding in a motor vehicle	0.011	0.011	0.012	0.000
Working at a paid job	0.000	0.399	0.015	0.000
Working around the house or yard	0.514	0.000	0.005	0.130
Attending school	0.000	0.008	0.000	0.000
Sports and exercise	0.000	0.000	0.225	0.007
Leisure activity (excluding sports)	0.205	0.296	0.498	0.197
Sleeping, resting, eating, or drinking	0.003	0.005	0.000	0.189
Cooking	0.005	0.000	0.000	0.023
Other	0.261	0.282	0.245	0.454

^aTwo fall-injury episodes could not be classified due to missing values on all indicators.