Table 1.
Comparison between students with and without scabies, and univariable and multivariable logistic regression analyses
| Variable | Without scabies (n = 1,564) | With scabies (n = 338) | OR (95 % CI) | P-value | aOR (95 % CI)a | P-value |
|---|---|---|---|---|---|---|
| Number (%) | Number (%) | |||||
| Age group (years) | ||||||
| ≤ 15 | 1,039 (79.6) | 267 (20.4) | 1.90 (1.43–2.52) | < 0.0001* | 1.11 (0.65–0.87) | 0.708 |
| > 15 | 525 (88.1) | 71 (11.9) | 1 | 1 | ||
| Sex | ||||||
| Females | 827 (87.8) | 115 (12.2) | 1 | 1 | ||
| Males | 737 (76.8) | 223 (23.2) | 2.18 (1.70–2.78) | < 0.0001* | 2.06 (1.40–3.01) | < 0.0001* |
| Level of education | ||||||
| First cycle | 1,027 (81.9) | 227 (18.1) | 1.07 (0.83–1.37) | 0.599 | 1.67 (1.02–2.71) | 0.040* |
| Second cycle | 537 (82.9) | 111 (17.1) | 1 | 1 | ||
| Number of students in the school | ||||||
| ≤ 500 | 438 (90.9) | 44 (9.1) | 1 | 1 | ||
| > 500 | 1,126 (79.3) | 294 (20.7) | 2.60 (1.86–3.64) | < 0.0001* | 1.65 (0.99–2.74) | 0.054 |
| Number of students using the same toilet | ||||||
| ≤ 10 | 25 (86.2) | 4 (13.8) | 1 | |||
| > 10 | 1,539 (82.2) | 334 (17.8) | 1.36 (0.47–3.92) | 0.574 | / | / |
| Number of students per dormitory | ||||||
| ≤ 10 | 84 (77.8) | 24 (22.2) | 1.35 (0.86–2.16) | 0.214 | 6.99 (3.34–14.71) | < 0.0001* |
| > 10 | 1,480 (82.5) | 314 (17.5) | 1 | 1 | ||
| Number of baths | ||||||
| At least twice daily | 73 (61.3) | 46 (38.7) | 0.31 (0.21–0.46) | < 0.0001* | 0.52 (0.25–1.07) | 0.076 |
| Less than twice daily | 1,491 (83.6) | 292 (16.4) | 1 | 1 | ||
| Access to infirmary | ||||||
| No | 772 (80.3) | 189 (19.7) | 1.30 (1.03–1.65) | 0.029* | 1.62 (1.12–2.32) | 0.009* |
| Yes | 792 (84.2) | 149 (15.8) | 1 | |||
| Sleeping with others | ||||||
| No | 1,494 (83.6) | 293 (16.4) | 1 | 1 | ||
| Yes | 70 (60.9) | 45 (39.1) | 3.28 (2.21–4.87) | < 0.0001* | 1.29 (0.69–2.41) | 0.433 |
| Sharing of beddings, clothes or toilet stuffs | ||||||
| No | 677 (85.4) | 116 (14.6) | 1 | 1 | ||
| Yes | 887 (80.0) | 222 (20.0) | 1.46 (1.14–1.87) | 0.002* | 1.08 (0.73–1.59) | 0.700 |
| Usage of soap for baths | ||||||
| No | 150 (65.2) | 80 (34.8) | 1 | 1 | ||
| Yes | 1,414 (84.6) | 258 (15.4) | 0.34 (0.25–0.46) | < 0.0001* | 0.76 (0.44–1.32) | 0.329 |
| Finger nails always cut short | ||||||
| No | 352 (74.1) | 123 (25.9) | 1 | 1 | ||
| Yes | 1,212 (84.9) | 215 (15.1) | 0.51 (0.40–0.65) | < 0.0001* | 0.84 (0.55–1.30) | 0.439 |
| Ironing of clothes and bedding | ||||||
| No | 1,220 (81.8) | 272 (18.2) | 1 | |||
| Yes | 344 (83.9) | 66 (16.1) | 0.86 (0.64–1.16) | 0.317 | / | / |
| Pruritus in the close entourage | ||||||
| No | 999 (90.2) | 108 (9.8) | 1 | 1 | ||
| Yes | 565 (71.1) | 230 (28.9) | 3.77 (2.94–4.84) | < 0.0001* | 1.30 (0.87–1.93) | 0.196 |
| Complaining of pruritus | ||||||
| No | 1,441 (96.8) | 48 (3.2) | 1 | 1 | ||
| Yes | 123 (29.8) | 290 (70.2) | 70.78 (49.55–101.11) | < 0.0001* | 93.37 (60.04–145.19) | < 0.0001* |
Abbreviations: aOR adjusted odds ratio, CI confidence interval, OR odds ratio
aAll variables with P < 0.25 in univariable analyses (plus level of education) were introduced in the multivariable model. The coefficient of determination of this model was R 2 of McFadden = 0.520 (P < 0.0001)
* P-value < 0.05