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Table 1 Patient demographics of the 4 datasets

From: Development and evaluation of the MAINTAIN instrument, selecting patients suitable for secondary or tertiary preventive manual care: the Nordic maintenance care program

Variable Dataset 1 (Development) Dataset 2 (External validation) Dataset 3 (External validation) Dataset 4 (External validation)
Description of recruitment sites and sample characteristics Primary care “Chiropractic”, not on sick leave Primary care, not on sick leave with a high risk of chronicity Secondary care, recurrent sick leave Secondary care, ongoing sick leave
n 249 128 251 184
Female, n (%) 154 (61.8) 14 (10.9) 140 (55.8) 101 (54.9)
Age, Mean (SD) 43.4 (11.9) 41.5 (9.6) 42.3 (9.3) 43.6 (10.3)
Pain Severitya, Mean (SD) 3.3 (1.1) 2.8 (1.3) 3.5 (1.1) 3.7 (1.1)
Interferencea, Mean (SD) 2.8 (1.3) 2.5 (1.3) 3.8 (1.1) 3.8 (1.0)
Life Controla, Mean (SD) 3.5 (1.1) 3.8 (1.1) 3.2 (1.1) 3.1 (1.2)
Affective Distressa, Mean (SD) 2.7 (1.3) 2.3 (1.4) 2.6 (1.6) 2.8 (1.5)
Supporta, Mean (SD) 4.1 (1.6) 4.2 (1.6) 4.6 (1.5) 4.8 (1.6)
Punishing Responsesa, Mean (SD) 1.1 (1.3) 1.3 (1.3) 1.1 (1.2) 1.0 (1.2)
Solicitous Responsesa, Mean (SD) 2.7 (1.4) 2.9 (1.4) 3.2 (1.4) 3.1 (1.4)
Distracting responsesa, Mean (SD) 2.8 (1.4) 3.0 (1.6) 3.1 (1.6) 3.2 (1.6)
MPI-Subgroup, % (AC/ID/DYS) 36.5/24.9/38.6 48.4/25.8/25.8 24.9/24.5/50.6 21.2/25.5/53.3
MAINTAIN Score, − 12 to 48, Mean (SD) 20.0 (8.4) 16.5 (9.7) 23.0 (8.9) 23.5 (8.1)
  1. AC, Adaptive Coper; ID, Interpersonally Distressed; DYS, Dysfunctional; SD, Standard Deviation
  2. aDimensions from the MPI instrument