Table 2.

Patient Characteristics and Functional Ratings over time Stratified by Joint Replacement Status (categorical variable as %, continuous variables as M, sd).

		Joint Replacement
	Total	Knee	Hip	P value
N	12,199	7,434	4,765
Age in years	71.3 (11.4)	71.3 (10.6)	71.3 (12.4)	< .001
< 65	25.2%	24.8%	25.7%
65 – 75	31.2%	33.0%	28.4%
75 – 85	34.7%	34.2%	35.6%
> 85	8.9%	8.0%	10.3%
Male	31.7%	29.2%	35.7%	< .001
White	82.5%	80.5%	85.6%	< .001
Married	49.6%	50.1%	48.9%	.187
Living status				.273
Alone	35.0%	34.7%	35.6%
With others	65.0%	65.3%	64.4%
Comorbid sum	7.6 (2.6)	7.7 (2.6)	7.5 (2.7)	.006
Length of stay, days	8.7 (3.8)	8.4 (3.7)	9.1 (4.0)	< .001
Length of follow-up, days	107.4 (25.6)	107.2 (25.3)	107.7 (26.1)	.338
FIM motor mean item scores+
Self-care +				< .001
Admission	4.1 (0.8)	4.2 (0.8)	4.0 (0.8)	< .001
Discharge	5.8 (0.7)	5.8 (0.7)	5.7 (0.7)	< .001
Follow-up *	6.7 (0.6)	6.7 (0.5)	6.6 (0.6)	< .001
Sphincter control+				< .001
Admission	4.5 (1.5)	4.6 (1.5)	4.5 (1.5)	< .001
Discharge	5.7 (1.1)	5.7 (1.1)	5.6 (1.1)	< .001
Follow-up *	6.7 (0.6)	6.7 (0.6)	6.7 (0.7)	.009
Transfer+				< .001
Admission	2.95 (0.9)	2.99 (0.9)	2.89 (0.9)	< .001
Discharge	5.07 (1.0)	5.12 (0.9)	4.98 (1.0)	< .001
Follow-up *	6.39 (0.7)	6.42 (0.7)	6.33 (0.7)	< .001
Locomotion+				< .001
Admission	1.6 (0.76)	1.6 (0.75)	1.6 (0.8)	.552
Discharge	4.2 (1.36)	4.3 (1.33)	4.1 (1.4)	< .001
Follow-up *	5.6 (1.31)	5.7 (1.28)	5.5 (1.4)	< .001
FIM cognition mean item scores +				.102
Admission	5.9 (1.0)	6.0 (1.0)	5.9 (1.0)	.034
Discharge	6.4 (0.7)	6.4 (0.7)	6.4 (0.7)	.256
Follow-up *	6.8 (0.5)	6.8 (0.4)	6.8 (0.5)	.859

Note:

^*the corresponding statistics are computed based on N = 10,680

⁺Values are mean ratings from individual items within each subscale