Table 4.
The Independent Sample t Test
| Widening Group (WG) | Non-widening Group (NWG) | Mean Difference | 95% Confidence Interval of the Mean Difference |
P Value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lower | Upper | |||||||||
| DASH 0 | 44.5 | ± | 2.9 | 44.8 | ± | 1.8 | –3.8 | –1.7 | .95 | .568 |
| DASH 6 | 37.0 | ± | 2.1 | 36.3 | ± | 1.2 | .64 | –.29 | 1.5 | .174 |
| DASH 12 | 31.2 | ± | 2.5 | 30.2 | ± | 1.3 | 1.0 | –.09 | 2.1 | .073 |
| DASH 18 | 24.1 | ± | 2.5 | 23.0 | ± | 1.5 | 1.0 | –.09 | 2.1 | .072 |
| DASH 24 | 14.9 | ± | 2.2 | 13.7 | ± | 2.7 | 1.1 | –.18 | 2.4 | .089 |
| CMS 0 | 64.2 | ± | 4.1 | 67.1 | ± | 6.5 | –2.8 | –5.7 | –.03 | .066 |
| CMS 6 | 75.7 | ± | 3.6 | 77.0 | ± | 3.4 | –1.3 | –3.2 | .5 | .155 |
| CMS 12 | 83.1 | ± | 4.1 | 85.0 | ± | 4.2 | –1.9 | –4.1 | .3 | .090 |
| CMS 18 | 85.9 | ± | 3.4 | 87.5 | ± | 3.2 | -1.6 | –3.4 | .1 | .066 |
| CMS 24 | 85.5 | ± | 3.7 | 87.1 | ± | 3.4 | –1.5 | –3.4 | .3 | .097 |
| ASOSS 0 | 42.6 | ± | 1.4 | 43.2 | ± | 1.2 | –.60 | –1.3 | .13 | .107 |
| ASOSS 6 | 49.8 | ± | 2.9 | 50.8 | ± | 1.9 | –1.0 | –2.3 | .31 | .130 |
| ASOSS 12 | 57.0 | ± | 2.8 | 58.2 | ± | 1.5 | –1.1 | –2.4 | .06 | .064 |
| ASOSS 18 | 66.7 | ± | 4.7 | 68.5 | ± | 1.9 | –1.7 | –3.7 | .19 | .076 |
| ASOSS 24 | 78.7 | ± | 4.7 | 81.1 | ± | 5.8 | –2.4 | –5.2 | .30 | .080 |
| SPORTS 0 | 3.0 | ± | .5 | 3.3 | ± | .97 | –.25 | –.65 | .15 | .215 |
| SPORTS 6 | 3.2 | ± | .8 | 3.5 | ± | 1.2 | –.29 | –.84 | .25 | .287 |
| SPORTS 12 | 3.9 | ± | 1.4 | 4.2 | ± | 1.5 | –.33 | –1.1 | .43 | .392 |
| SPORTS 18 | 5.8 | ± | 2.2 | 6.3 | ± | 2.7 | –.46 | –1.7 | .85 | .484 |
| SPORTS 24 | 6.1 | ± | 2.3 | 6.3 | ± | 2.7 | –.18 | –1.5 | 1.1 | .785 |
| CC post | 10.3 | ± | 1.0 | 10.4 | ± | 1.0 | –.14 | –.70 | .40 | .592 |
| CC 0 | 14.9 | ± | .8 | 12.0 | ± | 1.8 | 2.8 | 2.1 | 3.5 | .000 |
| CC 6 | 15.8 | ± | 1.5 | 12.4 | ± | 2.2 | 3.4 | 2.4 | 4.4 | .000 |
| CC 12 | 15.6 | ± | 1.3 | 12.3 | ± | 2.0 | 3.2 | 2.3 | 4.1 | .000 |
| CC 18 | 15.6 | ± | 1.3 | 12.2 | ± | 1.9 | 3.4 | 2.5 | 4.3 | .000 |
| CC 24 | 15.7 | ± | 1.3 | 12.2 | ± | 2.0 | 3.5 | 2.6 | 4.4 | .000 |
| External rotation 60° | .43 | ± | .02 | .45 | ± | .03 | –.01 | –.03 | .001 | .067 |
| External rotation 120° | .40 | ± | .02 | .41 | ± | .04 | –.01 | –.03 | .001 | .072 |
| External rotation 180° | .36 | ± | .02 | .38 | ± | .03 | –.01 | –.03 | .001 | .083 |
| Abduction 60° | .73 | ± | .01 | .74 | ± | .01 | .005 | –.01 | .001 | .074 |
| Abduction 120° | .71 | ± | .01 | .72 | ± | .01 | .006 | –.01 | .001 | .071 |
NOTE. 0 indicates baseline assessment; 6, 6-month assessment; 12, 12-month assessment; 18, 18-month assessment; and 24, 24-month assessment.
ASOSS, Athletic Shoulder Outcome Scoring System; CC, Coracoclavicular; CMS, Constant–Murley Score; DASH, Disabilities of Arm, Shoulder and Hand; Post, immediately postoperative; SPORTS, Subjective Patient Outcome for Return to Sports.