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Table 1 Baseline characteristics of the study sample

From: Low social acceptance among peers increases the risk of persistent musculoskeletal pain in adolescents. Prospective data from the Fit Futures Study

Variables Baseline sample n = 775 Follow-up participants, main analysis n = 539 Follow-up participants, secondary analysis n = 692
Sex, females 355 (45.8) 280 (51.9) 381 (55.1)
Age (mean, SD) 16.1 (0.5) 16.1 (0.5) 16.1 (0.5)
BMI
 Thinness 38 (4.9) 29 (5.4) 34 (4.9)
 Normal weight 551 (71.1) 392 (72.2) 504 (71.8)
 Overweight/obese 183 (23.6) 117 (21.7) 153 (22.1)
Missing 3 (0.4) 1 (0.2) 1 (0.1)
Mother education
 Low 243 (31.4) 169 (31.4) 228 (32.9)
 High 308 (39.7) 229 (42.5) 289 (41.8)
 Don’t know 206 (26.6) 133 (24.7) 166 (24.0)
Missing 18 (2.3) 8 (1.5) 9 (1.3)
Father education
 Low 291 (37.5) 198 (36.7) 253 (37.0)
 High 238 (30.7) 187 (34.7) 237 (34.2)
 Don’t know 215 (27.7) 138 (25.6) 182 (27.0)
Missing 31 (4.0) 16 (3.0) 17 (2.5)
Chronic diseases, yes 198 (25.5) 135 (25.0) 205 (29.6)
Missing 6 (0.8) 4 (0.7) 5 (0.7)
Low social acceptancea 212 (27.4) 148 (27.5) 198 (28.6)
Missing 27 (3.5) 15 (2.8) 11 (1.6)
Psychological distressb 107 (13.8) 76 (14.1) 131 (18.9)
Missing 24 (3.1) 9 (1.7) 17 (2.5)
  1. Values are number, n (%) if not otherwise stated. Main analyses = participants without persistent MSK pain at baseline, secondary analyses = all participants with and without persistent MSK pain at baseline. BMI body mass index, MSK musculoskeletal; aSubscale from Self-perception profile for adolescents scale. Low social acceptance ≤3.0. bHopkins symptom check list-10 (1–4), psychological distress = ≥ 1.85