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Table 3 PPE and measures adopted in the three area with different prevalence of COVID-19 by years-professional-experience categories

From: COVID-19 pandemic and dental hygienists in Italy: a questionnaire survey

Working-experience 1–10 yy High prevalence area Medium prevalence area Low prevalence area Total sample
OF % OF % OF % OF %
PPE and device adopted no responders n = 253 (22.33%)
Use of FFP2/FFP3 facial filter χ2(2) = 7.83 p = 0.09 Trend across COVID19 prevalence areas z = 1.47 p = 0.14
 Yes 233 34.78 69 29.24 60 26.43 362 31.95
 No 299 44.63 106 44.92 113 49.78 518 45.72
Use of disposable gown χ2(2) = 4.54 p = 0.34 Trend across COVID19 prevalence areas z = 1.49 p = 0.14
 Yes 116 17.31 45 19.07 36 15.86 197 17.39
 No 416 62.09 130 55.08 137 60.35 683 60.28
Use of safety glasses or visor χ2(2) = 3.97 p = 0.41 Trend across COVID19 prevalence areas z = 1.50 p = 0.14
 Yes 477 71.19 161 68.22 157 69.16 795 70.17
 No 55 8.21 14 5.93 16 7.05 85 7.50
Rotating instrument with anti-retraction valve χ2(2) = 5.12 p = 0.28 Trend across COVID19 prevalence areas z = 1.49 p = 0.13
 Yes 41 6.12 17 7.20 19 8.37 77 6.80
 No 491 73.28 158 66.95 154 67.84 803 70.87
Measures adopted no responders n = 272 (24.01%)
Phone triage χ2(2) = 28.74 p < 0.01 Trend across COVID19 prevalence areas z = 1.61 p = 0.11
 Yes 381 56.87 103 43.64 90 39.65 574 50.66
 No 141 21.04 68 28.81 78 34.36 287 25.33
Appointments delayed so to not saturate the waiting room χ2(2) = 4.33 p = 0.36 Trend across COVID19 prevalence areas z = 1.67 p = 0.09
 Yes 259 38.66 92 38.98 85 37.44 436 38.48
 No 263 39.25 79 33.47 83 36.56 425 37.51
Postponement of therapy of elderly patients χ2(2) = 5.35 p = 0.25 Trend across COVID19 prevalence areas z = 1.65 p = 0.09
 Yes 169 25.22 58 24.58 46 20.26 273 24.10
No 353 52.69 113 47.88 122 53.74 588 51.90
Washing the patient’s hands χ2(2) = 16.32 p < 0.01 Trend across COVID19 prevalence areas z = 1.62 p = 0.10
 Yes 380 56.72 113 47.88 98 43.17 591 52.16
 No 142 21.19 58 24.58 70 30.84 270 23.83
Working-experience 11–20 yy High prevalence area Medium prevalence area Low prevalence area Total sample
OF % OF % OF % OF %
PPE and device adopted by the dental hygienists no responders n = 214 (23.19%)
Use of FFP2/FFP3 facial filter χ2(2) = 1.59 p = 0.81 Trend across COVID19 prevalence areas z = 1.47 p = 0.31
 Yes 132 29.80 69 31.36 74 28.46 275 29.79
 No 213 48.08 102 46.36 119 45.77 434 47.02
Use of disposable gown χ2(2) = 3.94 p = 0.41 Trend across COVID19 prevalence areas z = 0.99 p = 0.32
 Yes 86 19.41 36 16.36 37 14.23 159 17.23
 No 259 58.47 135 61.36 156 60.00 550 59.59
Use of safety glasses or visor χ2(2) = 2.30 p = 0.68 Trend across categories of COVID19 prevalence areas z = 1.00 p = 0.32
 Yes 316 71.33 154 70.00 172 66.15 642 69.56
 No 29 6.55 17 7.73 21 8.08 67 7.26
Rotating instrument with anti-retraction valve χ2(2) = 2.96 p = 0.56 Trend across COVID19 prevalence areas z = 1.01 p = 0.32
 Yes 29 6.55 10 4.55 18 6.92 57 6.18
 No 316 71.33 161 73.18 175 67.31 652 70.64
Measures adopted by the dental hygienists no responders n = 238 (25.79%)
Phone triage χ2(2) = 4.72 p = 0.317 Trend across COVID19 prevalence areas z = 0.77 p = 0.44
 Yes 227 51.24 104 47.27 112 43.08 443 48.00
 No 106 23.93 60 27.27 76 29.23 242 26.22
Appointments delayed so to not saturate the waiting room χ2(2) = 1.87 p = 0.76 Trend across COVID19 prevalence areas z = 0.80 p = 0.42
 Yes 150 33.86 82 37.27 90 34.62 322 34.89
 No 183 41.31 82 37.27 98 37.69 363 39.33
Postponement of therapy of elderly patients χ2(2) = 3.32 p = 0.50 Trend across COVID19 prevalence areas z = 0.78 p = 0.44
 Yes 134 30.25 54 24.55 69 26.54 257 27.84
 No 199 44.92 110 50.00 119 45.77 428 46.37
Washing the patient’s hands χ2(2) = 19.23 p < 0.01 Trend across COVID19 prevalence areas z = 0.75 p = 0.45
 Yes 239 53.95 98 44.55 101 38.85 438 47.45
 No 94 21.22 66 30.00 87 33.46 247 26.76
Working-experience > 20 yy High prevalence area Medium prevalence area Low prevalence area Total sample
OF % OF % OF % OF %
PPE and device adopted by the dental hygienists no responders n = 210 (25.77%)
Use of FFP2/FFP3 facial filter χ2(2) = 7.39 p = 0.12 Trend across COVID19 prevalence areas z = −1.05 p = 0.29
 Yes 82 27.24 93 34.19 65 26.86 240 29.45
 No 137 45.51 107 39.34 121 50.00 365 44.79
Use of disposable gown χ2(2) = 3.83 p = 0.43 Trend across COVID19 prevalence areas z = − 1.06 p = 0.29
 Yes 50 16.61 56 20.59 40 16.53 146 17.91
 No 169 56.15 144 52.94 146 60.33 459 56.32
Use of safety glasses or visor χ2(2) = 4.66 p = 0.32 Trend across COVID19 prevalence areas z = −1.06 p = 0.29
 Yes 201 66.78 175 64.34 172 71.07 548 67.24
 No 18 5.98 25 9.19 14 5.79 57 6.99
Rotating instrument with anti-retraction valve χ2(2) = 11.10 p = 0.02 Trend across COVID19 prevalence areas z = −1.05 p = 0.29
 Yes 31 10.30 11 4.04 26 10.74 68 8.34
 No 188 62.46 189 69.49 160 66.12 537 65.89
Measures adopted by the dental hygienists no responders n 237 = (29.08%)
 Phone triage χ2(2) = 21.99 p < 0.001 Trend across COVID19 prevalence areas z = −1.70 p = 0.09
 Yes 145 48.17 95 34.93 115 47.52 355 43.56
 No 60 19.93 97 35.66 66 27.27 223 27.36
Appointments delayed to not saturate the waiting room χ2(2) = 3.85 p = 0.43 Trend across COVID19 prevalence areas z = − 167 p = 0.09
 Yes 109 36.21 107 39.34 105 43.39 321 39.39
 No 96 31.89 85 31.25 76 31.40 257 31.53
Postponement of therapy of elderly patients χ2(2) = 3.47 p = 0.48 Trend across COVID19 prevalence areas z = −1.70 p = 0.09
 Yes 95 31.56 92 33.82 80 33.06 267 32.76
 No 110 36.54 100 36.76 101 41.74 311 38.16
Washing the patient’s hands χ2(2) = 9.10 p = 0.06 Trend across COVID19 prevalence areas z = − 171 p = 0.09
 Yes 141 46.84 116 42.65 103 42.56 360 44.17
 No 64 21.26 76 27.94 78 32.23 218 26.75