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. Author manuscript; available in PMC: 2021 May 1.
Published in final edited form as: J Pain. 2019 Sep 24;21(5-6):570–581. doi: 10.1016/j.jpain.2019.09.006

Table 3.

Patient reported outcomes among MED and MEDREC participants by daily use frequency

MED (n = 531) MEDREC (n = 458)
Subgroup Light n=200 (38%) Moderate n=197 (37%) Heavy n=134 (25%) F P Light n=107 (23%) Moderate n=185 (40%) Heavy n=166 (36%) F P
Pain severity 5.4 ± 0.2
n=186
6.2 ± 0.2
n=190
6.2 ± 0.2
n=127
9.1 <0.0001ab 5.2 ± 0.2
n=102
5.0 ± 0.2
n=170
5.0 ± 0.2
n=156
0.3 0.76
Pain interference 4.43 ± 0.2
n=185
5.44 ± 0.2
n=190
5.5 ± 0.2
n=127
7.8 <0.0001ab 3.9 ± 0.3
n=102
3.8 ± 0.2
n=170
3.9 ± 0.22
n=156
0.1 0.87
Physical Function 39.0 ± 0.2
n=179
39.2 ± 0.2
n=187
39.4 ± 0.2
n=126
1.0 0.372 37.8 ± 0.2
n=100
38.7 ± 0.2
n=162
38.4 ± 0.2
n=152
3.5 0.03a
Sleep Disturbance 51.3 ± 0.6
n=179
51.9 ± 0.63
n=187
52.7 ± 0.7
n=126
0.9 0.41 48.5 ± 0.8
n=101
49.3 ± 0.7
n=162
50.1 ± 0.7
n=153
1.2 0.31
Fatigue 54.5 ± 1.1
n=180
56 ± 1.1
n=189
55.2 ± 1.3
n=126
0.5 0.617 49.9 ± 1.2
n=101
51.8 ± 1.0
n=166
51.27 ± 1.0
n=153
0.8 0.45
Depression 5.9 ± 0.4
n=182
6.7 ± 0.4
n=190
7.5 ± 0.5
n=127
2.7 0.067 5.8 ± 0.6
n=102
5.6 ± 0.4
n=167
5.7 ± 0.4
n=155
0.0 0.95
Anxiety 5.6 ± 0.43
n=174
6.3 ± 0.4
n=179
7.18 ± 0.50
n=124
2.8 0.059 5.4 ± 0.5
n=98
5.9 ± 0.4
n=157
5.3 ± 0.4
n=149
0.6 0.55
Cognitive function 37.2 ± 0.8
n=174
35.0 ± 0.8
n=180
34.9 ± 0.9
n=123
2.6 0.071 37.0 ± 0.9
n=95
38.2 ± 0.7
n=151
38.0 ± 0.7
n=147
0.6 0.54
Positive Affect 23.5 ± 0.4
n=176
24.6 ± 0.4
n=181
25.2 ± 0.5
n=124
3.3 0.037b 24.6 ± 0.6
n=98
25.0 ± 0.5
n=158
25.2 ± 0.5
n=151
0.3 0.71
Negative Affect 24.7 ± 0.5
n=176
26.1 ± 0.4
n=181
26.8 ± 0.6
n=125
4.5 0.011b 25.9 ± 0.6
n=97
25.9 ± 0.5
n=158
26.7 ± 0.5
n=151
0.9 0.40

Table 3. Light = 1-2 uses per day, Moderate = 3-4 uses per day, Heavy =5 or more uses per day. Values represent estimated marginal mean ± standard error (SE). Adjusted for age, sex, and opioid and benzodiazepine. Post hoc pairwise differences obtained using Bonferroni’s test with paired differences in marginal means labeled a: light < moderate, b: light < heavy. Tests are two-tailed and significance considered p < 0.05. Significant p values are bold.