Table 6. Results of Plateau Analysis for All Questionnaires and Functional Metrics in Patients Older Than 59 Years^*.

	Score Change 1†, t (p)‡	Score Change 2, t (p)	Score Change 3, t (p)	Score Change 4, t (p)
MHQ
Overall and function	1.70 (0.13)	− 0.64 (0.54)	1.61 (0.14)	0.53 (0.61)
Activities of daily living	0.51 (0.62)	−1.02 (0.33)	1.17 (0.28)	−0.11 (0.92)
Work	0.99(0.34)	−0.68(0.52)	0.83(0.43)	−1.35(0.21)
Pain	−0.72 (0.50)	−0.24 (0.82)	−1.39 (0.20)	0.56 (0.60)
Aesthetic	0.00 (1.00)	1.86 (0.40)	0.12 (0.90)	0.85 (0.42)
Satisfaction	1.14 (0.29)	1.57 (0.15)	1.28 (0.24)	1.08 (0.31)
Overall score	1.14 (0.29)	0.20 (0.85)	1.65 (0.14)	0.09 (0.93)
CTQ
Symptom severity score	−2.37(0.05)	1.64(0.14)	−2.63(0.03)	−1.55(0.16)
Functional status score	−1.17 (0.29)	−0.65 (0.53)	−1.03 (0.33)	−1.21 (0.26)
DASH disability score	−0.74 (0.49)	−2.53 (0.04)	−0.43 (0.04)	−1.29 (0.68)

MHQ Michigan Hand Questionnaire; CTQ Carpal Tunnel Questionnaire; DASH, Disabilities of the Arm, Shoulder and Hand questionnaire.

^*Score change 1 is the difference in score between preoperatively and 6 weeks postoperatively. Score change 2 is between 6 weeks postoperatively and 3 months postoperatively. Score change 3 is between 3 months postoperatively and 6 months postoperatively. Score change 4 is between 6 months postoperatively and 1 year postoperatively. Values represent score changes that are not significantly different from 0. A transition from nonsignificantly different to significantly different corresponds to a plateau. This does not occur, confirming the results shown in Figure 4 that no early plateau occurred in this population.

^†Score change indicates the difference in score between each time point and represents the slope in the Figure 4 plot.

^‡Results are considered statistically significant at p < 0.0125 to allow for a Bonferroni correction accounting for the multiple comparisons.