One hundred ninety-nine staff consented to participate in the study out of a total of 360 session attendees (55%). Of these, 108 (54%) had been randomly assigned to a BST session and 91 (46%) to a TAU session. Half (n=99) completed assessments at all three time points (44 % TAU; 55% BST). These 99 (hereafter ‘study completers’) constituted 28 percent of all session attendees.
Among the non-completers, 53 had been assigned to BST and 47 to TAU. Eight were classified as incomplete because of technical software issues when video-recording one of their assessments and one (the first participant) because the IOA process prompted substantive changes to the assessment checklist. The primary reason for the remaining non-completers was missing the follow-up assessment (91 individuals: 50/53 BST, 41/47 TAU) largely due to difficulties scheduling a non-mandatory event during the pandemic (e.g., units restricting staff from leaving because of clinical staff shortages or patient outbreaks, staff illness).
Descriptive information for the expected degree of patient contact and for hospital department is shown in Table 1 for study participants (completers, non-completers), non-participants, and the total group of session attendees. When comparing study participants who were completers versus non-completers, there were higher percentages of non-completers who had direct patient contact (97 vs 94%), were nurses (48 vs 37%), or worked on inpatient units (64 vs 58%). Similarly, when compared to all session attendees, study completers had lower proportions of direct contact with patients and of nursing staff.
Table 1: Expected Patient Contact and Department Types for Study Participants, Non-Participants, and Total Session Attendees
Characteristic
|
Study Participants
(n=199)
|
Non-Participants
(n=161)
|
Total Session Attendees (n=360)
|
|
Completers
n=99
|
Non-Completers
n=100
|
|
|
|
Expected Patient Contact (%)
|
Direct
Nurse
Security
Other
Less Direct
Rare/None
|
94
37
6
51
4
2
|
97
48
5
44
3
0
|
|
96
47
3
47
3
1
|
96
44
4
47
3
1
|
Department Type (%)
|
Inpatient
Outpatient
Both
Hospital Admin
|
58
9
30
2
|
64
9
26
1
|
|
51
14
33
1
|
56
11
30
1
|
Figure 1 depicts the self-protection and team-control competence scores for the study completers (left and right sides, respectively). The hypothesis-testing results showed a significant difference by training Method (self-protection: chi-square=34.46, 1 df, p<.001; team-control: chi-square=50.42, 1 df, p<.001). There was also a significant decline between post-training and follow-up (Time) for both skill categories independent of Method (self-protection: chi-square=81.29, 1 df, p<.001; team-control: chi-square=56.51, 1 df, p<.001), and a significant Method-by-Time interaction independent of Method and Time for team-control skills (chi-square=17.41, 1 df, p<.001). BST-TAU comparisons showed no difference at baseline for either type of skill (not shown). However, BST was significantly better than TAU at both post-training (self-protection: Cohen’s d=1.45 [1.02, 1.87], large ES; team-control: Cohen’s d=2.55 [2.08, 3.02]; large ES) and follow-up (respectively – Cohen’s d=0.82 [0.40, 1.23], small ES; Cohen’s d=0.62 [0.21, 1.03], small ES). For both methods, competence scores dropped between post-training and follow-up although not to the original baseline levels.
Figure 1: Mean Observer-rated Competence in Self-Protection and Team-control skills across three time points by TAU and BST
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The skill mastery results for the study completers are shown in Figure 2. The mastery patterns paralleled the competence patterns in that BST was significantly better than TAU (self protection: chi-square=28.82, 1 df, p< .001; team-control: chi-square=72.87, 1 df, p<.001). There was also a significant Time effect independent of Method (self-protection: chi-square=27.54, 1 df, p<.001; team-control: chi-square=33.03, 1 df, p<.001). There were no significant interactions for either type of skill once the effects of Method and Time were accounted for. BST-TAU comparisons showed no difference in percent achieving Mastery at baseline (not shown) but large risk ratios at both post-training (self-protection: 13.43 [4.01, >1000]; team-control: 31.24 [8.45,>1000] and follow-up [self-protection: 12.30 [1.58, >1000]; team-control: 30.60 [6.75. >1000]).
Figure 2: Percent of Participants Achieving Mastery[1] in Self-Protection and Team-control skills across three time points by TAU and BST
Insert Figure 2 about here
Confidence scores for the study completers are shown in Figure 3. The only significant main effect was for Time (self-protection: chi-square=57.15, 1 df, p<.001; team-control: chi-square=43.25, 1 df, p<.001). For both skill categories, the scores increased between baseline and post-training and then dropped at follow-up but not to the original baseline levels.
Figure 3: Mean Self-rated Confidence in Self-Protection and Team-control skills across three time points by TAU and BST
Insert Figure 3 about here
To assess what impact the high no-show rate for the follow-up could have had, we compared the completers and the non-completers on the six post-training outcomes (self-protection and team-control: competence, mastery, and confidence). Non-completers had slightly lower scores than completers except for the two confidence measures where their self-assessments were higher (not shown). However, the only significant difference between the two groups was for self-protection confidence means (6.9 vs 6.3, completers vs non- completers, t=2.40, 195 df, p=0.17).
In terms of past-month experience, few study completers reported events requiring self-protection (19 at baseline, 9 at follow-up) or team-control skills (14 at baseline, 14 at follow-up). Consequently, we only examined the presence or absence of experience without breaking it down by training method. We found non-significant results for both competence and mastery (not shown) but a potential impact on confidence for self-protection skills at follow-up and for team-control skills at baseline and post-training (Figure 4).
Figure 4: Mean Self-rated Confidence and 95-percent confidence intervals in Self-protection and Team-control skills across three time points by Past-month occasion to use skills
Insert Figure 4 about here