Model 1: Original data set | Headache, N = 181 (5 variables) | Migraine, N = 242 (8 variables) | TTH, N = 109 (4 variables) | H15+, N = 58 (2 variables) | ||||
Whole model | F = 10.3, p < 0.001, R2 adj: 0.208 | F = 13.9, p < 0.001, R2 adj: 0.299 | F = 6.9, p < 0.001, R2 adj: 0.181 | F = 6.6, p = 0.003, R2 adj: 0.165 | ||||
Variables with significance | β standardised | SPCsqr | β standardised | SPCsqr | β standardised | SPCsqr | β standardised | SPCsqr |
Year of publication | 0.258 | 0.060 | ||||||
Number (ln transformed) of participants | −0.207 | 0.040 | − 0.146 | 0.018 | ||||
dMig and pMig | 0.269 | 0.064 | ||||||
dTTH and pTTH | 0.321 | 0.102 | ||||||
Health-care personnel | 0.173 | 0.022 | ||||||
Sampling method | −0.169 | 0.022 | ||||||
Type of screening question | −0.307 | 0.090 | −0.285 | 0.080 | ||||
Number of conditions | −0.162 | 0.026 | ||||||
Mode of engagement | 0.281 | 0.078 | ||||||
SSA superregion | −0.148 | 0.021 | −0.173 | 0.028 | −0.232 | 0.052 | ||
SEEAO superregion | −0.171 | 0.029 | −0.136 | 0.018 | −0.294 | 0.084 | ||
NAME superregion | −0.113 | 0.011 | −0.231 | 0.051 | ||||
Model 2: ln transformed dependent variable and outliers (±1.5 interquartile range) removed | Headache, N = 176 (4 variables) | Migraine, N = 238 (7 variables) | TTH, N = 103 (4 variables) | H15+, N = 57 (2 variables) | ||||
Whole model | F = 11.3 p < 0.001, R2 adj: 0.191 | F = 13.6, p < 0.001, R2 adj: 0.271 | F = 5.5, p < 0.001, R2adj:0.150 | F = 6.5, p = 0.003, R2 adj: 0.164 | ||||
Variables with significance | β standardised | SPCsqr | β standardised | SPCsqr | β standardised | SPCsqr | β standardised | SPCsqr |
Year of publication | 0.259 | 0.064 | ||||||
Number (ln transformed) of participants | −0.186 | 0.032 | −0.137 | 0.016 | −0.354 | 0.125 | ||
dMig and pMig | 0.291 | 0.078 | ||||||
dTTH and pTTH | 0.166 | 0.027 | ||||||
Health-care personnel | 0.133 | 0.013 | ||||||
Sampling method | −0.169 | 0.022 | ||||||
Type of screening question | −0.277 | 0.072 | −0.233 | 0.054 | ||||
SEEAO superregion | −0.110 | 0.012 | −0.206 | 0.058 | −0.250 | 0.062 | ||
SSA superregion | −0.207 | 0.042 | −0.180 | 0.031 | −0.245 | 0.042 | ||
NAME superregion | −0.264 | 0.068 |