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Table 2 Interaction Effects Analysis for Hospitalizations – Multiple Imputation Results

From: Effect of socio-demographic and health factors on the association between multimorbidity and acute care service use: population-based survey linked to health administrative data

Sex, Age Group MMa Group Correlate Group Overall N (% with 1+ Hosp) OR (95% CI)b Inter.c (p-value)
Interaction #1: MM x Income
 Female, 65–74 0–1 >$80 k 640 (3) Ref 0.11
$30 k-$79.9 k 1950 (7) 2.25 (1.39, 3.63)
<$30 k 1286 (6) 1.95 (1.18, 3.22)
2–3 >$80 k 507 (8) Ref
$30 k-$79.9 k 1955 (10) 1.22 (0.86, 1.74)
<$30 k 1672 (11) 1.36 (0.96, 1.94)
4+ >$80 k 108 (15) Ref
$30 k-$79.9 k 563 (16) 1.08 (0.60, 1.92)
<$30 k 749 (20) 1.42 (0.81, 2.48)
 Female, 75–84 0–1 >$80 k 210 (9) Ref 0.20
$30 k-$79.9 k 937 (7) 0.82 (0.47, 1.41)
<$30 k 962 (10) 1.20 (0.71, 2.03)
2–3 >$80 k 285 (9) Ref
$30 k-$79.9 k 1421 (15) 1.65 (1.08. 2.51)
<$30 k 1719 (15) 1.63 (1.08, 2.48)
4+ >$80 k 102 (20) Ref
$30 k-$79.9 k 429 (23) 1.21 (0.71, 2.08)
<$30 k 773 (24) 1.32 (0.79, 2.21)
 Male, 65–74 0–1 >$80 k 911 (7) Ref 0.52
$30 k-$79.9 k 1805 (7) 1.10 (0.80, 1.51)
<$30 k 804 (10) 1.61 (1.14, 2.28)
2–3 >$80 k 686 (11) Ref
$30 k-$79.9 k 1752 (13) 1.26 (0.95, 1.66)
<$30 k 798 (14) 1.36 (0.99, 1.87)
4+ >$80 k 107 (16) Ref
$30 k-$79.9 k 407 (23) 1.57 (0.89, 2.77)
<$30 k 279 (25) 1.77 (0.99, 3.19)
 Male, 75–84 0–1 >$80 k 253 (8) Ref 0.65
$30 k-$79.9 k 866 (12) 1.47 (0.90, 2.41)
<$30 k 483 (16) 2.06 (1.24, 3.43)
2–3 >$80 k 350 (15) Ref
$30 k-$79.9 k 1238 (17) 1.15 (0.83, 1.59)
<$30 k 616 (20) 1.34 (0.94, 1.90)
4+ >$80 k 97 (21) Ref
$30 k-$79.9 k 400 (28) 1.46 (0.85, 2.50)
<$30 k 241 (30) 1.64 (0.93, 2.88)
Interaction #2: MM x Self-Perceived Mental Health
 Female, 65–74 0–1 Excellent 3192 (6) Ref 0.97
Good 627 (7) 1.15 (0.81, 1.63)
Fair/Poor 57 (< 11)d 1.24 (0.44, 3.47)
2–3 Excellent 3040 (9) Ref
Good 900 (12) 1.27 (1.00, 1.62)
Fair/Poor 194 (12) 1.31 (0.83, 2.06)
4+ Excellent 828 (17) Ref
Good 415 (19) 1.12 (0.82, 1.52)
Fair/Poor 177 (20) 1.26 (0.83, 1.89)
 Female, 75–84 0–1 Excellent 1633 (8) Ref 0.53
Good 435 (9) 1.12 (0.77, 1.63)
Fair/Poor 41 (17) 2.28 (0.99, 5.25)
2–3 Excellent 2404 (14) Ref
Good 864 (15) 1.05 (0.84, 1.31)
Fair/Poor 257 (16) 1.17 (0.75, 1.82)
4+ Excellent 740 (23) Ref
Good 383 (24) 1.04 (0.78, 1.40)
Fair/Poor 181 (23) 0.99 (0.68, 1.47)
 Male, 65–74 0–1 Excellent 2792 (8) Ref 0.65
Good 643 (8) 1.06 (0.77, 1.46)
Fair/Poor 85 (13) 1.83 (0.96, 3.50)
2–3 Excellent 2257 (13) Ref
Good 805 (12) 0.96 (0.75, 1.22)
Fair/Poor 174 (13) 1.05 (0.67, 1.66)
4+ Excellent 444 (21) Ref
Good 242 (23) 1.10 (0.75, 1.60)
Fair/Poor 107 (29) 1.52 (0.94, 2.44)
 Male, 75–84 0–1 Excellent 1173 (12) Ref 0.0009
Good 371 (13) 1.19 (0.84, 1.68)
Fair/Poor 58 (22) 2.20 (1.16, 4.19)
2–3 Excellent 1459 (17) Ref
Good 597 (17) 1.03 (0.80, 1.33)
Fair/Poor 148 (30) 2.11 (1.45, 3.09)
4+ Excellent 407 (29) Ref
Good 208 (30) 1.07 (0.74, 1.54)
Fair/Poor 123 (20) 0.61 (0.37, 1.00)
Interaction # 3: MM x Instrumental Activities of Daily Living
 Female, 65–74 0–1 Does not need help 3575 (5) Ref 0.49
Needs help 301 (12) 2.48 (1.71, 3.61)
2–3 Does not need help 3372 (8) Ref
Needs help 762 (17) 2.27 (1.81, 2.84)
4+ Does not need help 833 (14) Ref
Needs help 587 (24) 1.92 (1.46, 2.52)
 Female, 75–84 0–1 Does not need help 1750 (8) Ref 0.0001
Needs help 359 (12) 1.64 (1.14, 2.34)
2–3 Does not need help 2235 (10) Ref
Needs help 1190 (22) 2.38 (1.96, 2.89)
4+ Does not need help 526 (22) Ref
Needs help 778 (25) 1.18 (0.91, 1.54)
 Male, 65–74 0–1 Does not need help 3373 (7) Ref 0.89
Needs help 147 (16) 2.33 (1.46, 3.70)
2–3 Does not need help 2895 (11) Ref
Needs help 341 (22) 2.18 (1.64, 2.88)
4+ Does not need help 575 (18) Ref
Needs help 218 (35) 2.42 (1.71, 3.44)
 Male, 75–84 0–1 Does not need help 1430 (11) Ref 0.25
Needs help 172 (20) 1.98 (1.31, 2.96)
2–3 Does not need help 1752 (15) Ref
Needs help 452 (29) 2.36 (1.85, 3.01)
4+ Does not need help 416 (23) Ref
Needs help 322 (33) 1.68 (1.21, 2.33)
  1. a MM multimorbidity
  2. b OR (95% CI) = Odds Ratio of 1+ Hospitalization (95% Confidence Interval)
  3. c Inter Interaction
  4. d (%) with 1+ hospitalizations rounded upward to avoid reporting of small cell size