Table 4.
Reporting of each quality item and supplementary item by structure format, presented with unadjusted and adjusted odds ratios (ORs)
| Items/Supplementary items | N (%) | Crude OR (95% CI) |
Adjusted OR (95% CI); P valuea |
||
|---|---|---|---|---|---|
| Overall (n = 341) |
IMRaD (n = 176) |
HS (n = 165) |
|||
| 1. Design | 120 (35.2) | 54 (30.7) | 66 (40.0) | 1.51 (0.96, 2.36) | 1.51 (0.77, 2.93); 0.228 |
| 2. Participant | 327 (95.9) | 166 (94.3) | 161 (97.6) | 2.43 (0.75, 7.89) | 2.43 (0.80, 7.33); 0.116 |
| 3. Setting | 182 (53.4) | 65 (36.9) | 117 (70.9) | 4.16 (2.64, 6.56) | 4.16 (1.74, 9.97); 0.001 |
| 4. Interventions | 268 (78.6) | 138 (78.4) | 130 (78.8) | 1.02 (0.61, 1.72) | 1.02 (0.64, 1.62); 0.924 |
| 5. Outcome | 177 (51.9) | 72 (40.9) | 105 (63.6) | 2.53 (1.63, 3.91) | 2.53 (1.30, 4.92); 0.006 |
| 5a. Time point | 138 (40.5) | 49 (27.8) | 89 (53.9) | 3.04 (1.94, 4.76) | 3.04 (1.49, 6.19); 0.002 |
| 5b. No. of outcomes b | 123 (36.1)c | 93 (52.8)c | 30 (18.2)c | 1.87 (0.88, 3.97)f | 1.83 (0.69, 4.87); 0.224 |
| 177 (51.9)d | 72 (40.9)d | 105 (63.6)d | |||
| 41 (12.0)e | 11 (6.3)e | 30 (18.2)e | |||
| 6. Random assignment | 336 (98.5) | 172 (97.7) | 164 (99.4) | 3.81 (0.42, 34.48) | 3.81 (0.47, 30.76); 0.209 |
| 6a. Unit of randomisation | 246 (72.1) | 141 (80.1) | 105 (63.6) | 0.43 (0.27, 0.71) | 0.43 (0.25, 0.77); 0.004 |
| 7. Sequence generation | 16 (4.7) | 11 (6.3) | 5 (3.0) | 0.47 (0.16, 1.38) | 0.47 (0.10, 2.25); 0.343 |
| 8. Allocation concealment | 7 (2.1) | 5 (2.8) | 2 (1.2) | 0.42 (0.08, 2.19) | 0.42 (0.06, 2.76); 0.366 |
| 9. Blinding (Masking) | 72 (21.1) | 38 (21.6) | 34 (20.6) | 0.94 (0.56, 1.59) | 0.94 (0.42, 2.14); 0.887 |
| 9a. Generic blinding | 57 (16.7) | 28 (15.9) | 29 (17.6) | 1.13 (0.64, 1.99) | 1.13 (0.51, 2.47); 0.765 |
IMRaD Introduction, methods, results, and discussion format, HS Highly structured format
aDerived from GEE analyses adjusting for potential clustering effect among abstracts published in the same journal, with individual quality item as the dependent variable (adequately reported vs. not adequately reported) and journal as the grouping factor;
bA continuous variable, not dichotomous;
cN (%) for category No. = 0; dN (%) for category 1 ≤ No. ≤ 2; eN (%) for category No. > 2;
fDerived from binary logistic regression (reference group: IMRaD format; dependent variable coding: [0] 1 ≤ No. ≤ 2, [1] No. > 2)